The conditions described above occur because of a manufacturing process
[[Page 15863]]
defect on a certain batch of PFD serial numbers during incorporation of a design improvement on the air data unit assembly. The root cause of this manufacturing process defect is still being analyzed.

This condition, if not corrected, could result in airspeed/altitude mismanagement or spatial disorientation of the pilot and consequent loss of airplane control, inadequate traffic separation, or controlled flight into terrain.

FAA's Determination and Requirements of This AD

We are issuing this AD because we evaluated all the information and determined the unsafe condition described previously is likely to exist or develop on type design airplanes that incorporate one of the affected PFDs. This AD requires a check of the maintenance records and inspection of the PFD (if necessary) to determine if an affected serial number PFD is installed. If an affected serial number PFD is installed, this AD requires you to incorporate information that limits operation when certain conditions for the PFD or backup instruments exist.

This is considered interim action. Avidyne is working on a process to rework and/or modify the affected PFD units. The FAA will consider taking additional rulemaking action to supersede this AD and terminate the above limitations when Avidyne completes the process development, and the FAA approves it as addressing the unsafe condition. FAA's Determination of the Effective Date

An unsafe condition exists that requires the immediate adoption of this AD. The FAA has found that the risk to the flying public justifies waiving notice and comment prior to adoption of this rule because PFDs that display incorrect attitude, altitude, and airspeed information could result in airspeed/altitude mismanagement or spatial disorientation of the pilot with consequent loss of airplane control, inadequate traffic separation, or controlled flight into terrain. Therefore, we determined that notice and opportunity for public comment before issuing this AD are impracticable and that good cause exists for making this amendment effective in fewer than 30 days.

Comments Invited

This AD is a final rule that involves requirements affecting flight safety, and we did not precede it by notice and an opportunity for public comment. We invite you to send any written relevant data, views, or arguments regarding this AD. Send your comments to an address listed under the ADDRESSES section. Include the docket number ``FAA20080340; Directorate Identifier 2008CE020AD'' at the beginning of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of the AD. We will consider all comments received by the closing date and may amend the AD in light of those comments.

We will post all comments we receive, without change, to http:// www.regulations.gov, including any personal information you provide. We will also post a report summarizing each substantive verbal contact we receive concerning this AD.

Authority for This Rulemaking

Title 49 of the United States Code specifies the FAA's authority to issue rules on aviation safety. Subtitle I, Section 106, describes the authority of the FAA Administrator. Subtitle VII, Aviation Programs, describes in more detail the scope of the Agency's authority.

We are issuing this rulemaking under the authority described in Subtitle VII, Part A, Subpart III, Section 44701, ``General requirements.'' Under that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action.

Regulatory Findings

We determined that this AD will not have federalism implications under Executive Order 13132. This AD will not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government.

For the reasons discussed above, I certify that this AD: (1) Is not a ``significant regulatory action'' under Executive Order 12866;
(2) Is not a ``significant rule'' under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and
(3) Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act.

We prepared a regulatory evaluation of the estimated costs to comply with this AD and placed it in the AD docket.

Examining the AD Docket

You may examine the AD docket that contains the AD, the regulatory evaluation, any comments received, and other information on the Internet at http://www.regulations.gov; or in person at the Docket Management Facility between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The Docket Office (telephone (800) 6475527) is located at the street address stated in the ADDRESSES section. Comments will be available in the AD docket shortly after receipt. List of Subjects in 14 CFR Part 39

Air transportation, Aircraft, Aviation safety, Safety. Adoption of the Amendment
Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows:
PART 39AIRWORTHINESS DIRECTIVES
1. The authority citation for part 39 continues to read as follows:

Authority: 49 U.S.C. 106(g), 40113, 44701.
Sec. 39.13 [Amended]
2. The FAA amends Sec. 39.13 by adding the following new airworthiness directive (AD):
20080628 Avidyne Corporation: Amendment 3915440; Docket No. FAA 20080340; Directorate Identifier 2008CE020AD.
Effective Date
(a) This AD becomes effective on April 10, 2008.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Avidyne Corporation (Avidyne) Primary Flight Displays (PFDs) (Part Numbers (P/Ns) 70000006000, 700 00006001, 70000006002, 70000006003, and 70000006100) that are installed on, but not limited to the following airplanes that are certificated in any category:
(1) Adam Aircraft Model A500;
(2) Cessna Aircraft Company Model 441 (STEC Alliant Supplemental Type Certificate (STC) No. SA09547ACD incorporated);
(3) Cessna Aircraft Company Models LC42550FG and LC41550FG (Columbia Aircraft Manufacturing and The Lancair Company previously held the type certificate for these airplanes);
(4) Cirrus Design Corporation Models SR20 and SR22;
[[Page 15864]]
(5) Diamond Aircraft Industries GmbH Model DA 40;
(6) Hawker Beechcraft Corporation Model E90 (STEC Alliant STC No. SA09545ACD incorporated);
(7) Hawker Beechcraft Corporation Model 200 series (STEC Alliant STC No. SA09543ACD incorporated); and
(8) Piper Aircraft, Inc. Models PA28161, PA28181, PA28R 201, PA32R301 (HP), PA32R301T, PA32301FT, PA32301XTC, PA34
220T, PA44180, PA46350P, PA46R350T, and PA46500TP.
Unsafe Condition
(d) This AD is the result of several field reports of PFDs displaying incorrect altitude and airspeed information. We are issuing this AD to prevent certain conditions from existing when PFDs display incorrect attitude, altitude, and airspeed information. This could result in airspeed/altitude mismanagement or spatial disorientation of the pilot with consequent loss of airplane control, inadequate traffic separation, or controlled flight into terrain.
Compliance
(e) To address this problem, you must do the following, unless already done:
Table 1.Actions, Compliance, and Procedures
Actions Compliance Procedures (1) Do a logbook check of Within 15 days after The owner/operator maintenance records to April 10, 2008 (the holding at least a determine if any PFD (P/Ns effective date of private pilot 70000006000, 70000006 this AD). certificate as 001, 70000006002, 700 authorized by 00006003, or 70000006 section 43.7 of the 100) with any affected Federal Aviation serial number listed in Regulations (14 CFR TABLE 2Serial Numbers of 43.7) may do the Affected PFDs is installed. logbook check. Make (i) If, as a result of this an entry into the check, you find any PFD aircraft logbook installed with an affected showing compliance serial number, do the with this portion action required by of the AD in paragraph (e)(3)(i) or accordance with (e)(3)(ii) of this AD.. section 43.9 of the (ii) If, as a result of this Federal Aviation check, you cannot Regulations (14 CFR positively identify the 43.9). serial number of the PFD,
do the inspection required
in paragraph (e)(2) of this
AD..
(iii) If, as a result of
this check, you positively
identify that the PFD
installed does not have a
serial number affected by
this AD, then no further
action is required..
(2) If you find, as a result Within 15 days after Not Applicable. of the check required by April 10, 2008 (the
paragraph (e)(1) of this AD effective date of
you cannot positively this AD).
identify the serial number
of the PFD, inspect any PFD
(P/Ns 70000006000, 700
00006001, 70000006002,
70000006003, or 70000006
100) for any affected
serial number listed in
TABLE 2 Serial Numbers of
Affected PFDs. You may do
the requirement of
paragraph (e)(3) of this AD
instead of this inspection.
(3) If you find, as a result Within 15 days after The owner/operator of the check required by April 10, 2008 (the holding at least a paragraph (e)(1) of this AD effective date of private pilot or the inspection required this AD). certificate as by paragraph (e)(2) of this authorized by AD, any PFD installed with section 43.7 of the an affected serial number, Federal Aviation do whichever of the Regulations (14 CFR following applies: 43.7) may insert (i) For airplanes with an the information airplane flight manual into the AFM, POH, (AFM), pilots operating AFMS, or handbook (POH), or airplane maintenance records flight manual supplement as required in (AFMS), incorporate the paragraph (e)(3)(i) language in the Appendix of or (e)(3)(ii)(A) of this AD into the this AD and/or Limitations section. fabricate the (ii) For airplanes without placard required in an AFM, POH, or AFMS, do paragraph the following:. (e)(3)(ii)(B) of (A) Incorporate the language this AD. Make an in the Appendix of this AD entry into the into your aircraft records; aircraft records and. showing compliance (B) fabricate a placard with these portions (using at least \1/8\inch of the AD in letters) with the following accordance with words and install the section 43.9 of the placard on the instrument Federal Aviation panel within the pilot's Regulations (14 CFR clear view: ``AD 20080628 43.9).
CONTAINS LIMITATIONS
REGARDING AVIDYNE PRIMARY
FLIGHT DISPLAYS (PFD) AND
REQUIRED INCORPORATION OF
THESE LIMITATIONS INTO THE
AIRCRAFT RECORDS. YOU MUST
FOLLOW THESE LIMITATIONS.''.
[[Page 15865]]
(4) Do not install any PFD As of the effective Not Applicable. (P/Ns 70000006000, 700 date of this AD.
00006001, 70000006002,
70000006003, or 70000006
100) with any affected
serial number listed in
TABLE 2Serial Numbers of

Affected PFDs.

Note 1: If you have an AFM, POH, or AFMS, you may fabricate and install a placard as described in paragraph (e)(3)(ii) of this AD in addition to, but not instead of, the Limitations section requirement of paragraph (e)(3)(i) of this AD.

Note 2: Avidyne Service Alert No. SA08001, dated February 12, 2008, pertains to the subject matter of this AD. The service information cautions that all pilots should be vigilant in conducting proper preflight and inflight checks of instrument accuracy.
Table 2.Serial Numbers of Affected PFDs
[AD 20080628]
D1023, D1031, D1037, D1069, D1075, D1080, D1084, D1090, D1101, D1102, D1106, D1112, D1115, D1136, D1138, D1141, D1144, D1158, D1170, D1172, D1174, D1178, D1188, D1197, D1199, D1212, D1234, D1240, D1249, D1253, D1254, D1256, D1259, D1260, D1262, D1270, D1272, D1277, D1283, D1288, D1313, D1319, D1327, D1351, D1364, D1380, D1387, D1391, D1396, D1405, D1412, D1428, D1433, D1434, D1435, F0006, F0011, F0021, F0030, F0031, F0032, F0035, 20002067, 20003147, 20003296, 20003316, 20004297, 20005316, 20005487, 20008167, 20008227, 20008255, 20009297, 20009476, 20010177, 20010255, 20011396, 20011456, 20012337, 20012506, 20013406, 20014027, 20014227, 20015357, 20017286, 20018317, 20018425, 20018486, 20019067, 20019297, 20020297, 20021067, 20021197, 20022177, 20022207, 20022217, 20022286, 20022287, 20022296, 20023197, 20023377, 20024196, 20024217, 20024297, 20024397, 20024407, 20024425, 20025067, 20025177, 20025217, 20025317, 20026067, 20026197, 20026207, 20026265, 20026377, 20026407, 20026506, 20027177, 20027226, 20027317, 20027377, 20028177, 20028337, 20029177, 20029197, 20029246, 20029265, 20029506, 0030197, 20030237, 20031207, 20031217, 20031406, 20031407, 20031516, 20032067, 20032265, 20032337, 20032516, 20033337, 20034207, 20034327, 20035177, 20036197, 20036237, 20036397, 20037265, 20037285, 20038127, 20038197, 20038337, 20039177, 20040127, 20040177, 20040197, 20040265, 20040317, 20041177, 20042197, 20042265, 20042317, 20042337, 20043197, 20043215, 20043237, 20043247, 20044226, 20044237, 20044285, 20045215, 20045265, 20045437, 20046215, 20047127, 20047147, 20047197, 20048197, 20048215, 20048247, 20049147, 20049357, 20050147, 20050287, 20050346, 20050434, 20051215, 20052215, 20053247, 20053257, 20053357, 20054247, 20054257, 20054357, 20055087, 20056247, 20056257, 20057237, 20057346, 20058346, 20061087, 20061247, 20062087, 20062247, 20063087, 20064087, 20064147, 20064226, 20064337, 20066147, 20067087, 20068147, 20068337, 20069087, 20071237, 20072087, 20073087, 20073346, 20073506, 20074207, 20075087, 20075147, 20075207, 20076217, 20076257, 20077087, 20077506, 20078087, 20078217, 20078257, 20078346, 20078496, 20084257, 20085396, 20087257, 20089257, 20089346, 20090346, 20092297, 20093247, 20094107, 20094416, 20097137, 20098037, 20099107, 20099346, 20099416, 20101416, 20102417, 20103396, 20104246, 20106224, 20111224, 20112224, 20114416, 20115346, 20116346, 20118416, 20123416, 20124456, 20126416, 20129346, 20135337, 20139336, 20140336, 20142037, 20142296, 20146037, 20147336, 20153037, 20158097, 20161097, 20164097, 20165097, 20166097, 20170097, 20170175, 20172175, 20177175, 20202257, 20204175, 20209246, 20214175, 20216265, 20217175, 20224175, 20224265, 20229265, 20232175, 20233175, 20236175, 20236265, 20241175, 20243265, 20265355, 20272355, 20273355, 20278355, 20281355, 20302384, 20308384, 20314384, 20317384, 20320305, 20321376, 20330376, 20330384, 20343384, 20347305, 20348305, 20350305, 20356305, 20359305, 20378475, 20380225, 20381225, 20382475, 20388225, 20402174, 20403174, 20438345, 20440345, 20447425, 20452315, 20458315, 20462315, 20467315, 20540094, 20550094, 20576445, 20580445, 20581445, 20582525, 20584525, 20591525, 20595065, 20599065, 20605065, 20615116, 20618065, 20638116, 20656284, 20732074, 20735176, 20739176, 20755493, 20814015, 20815015, 20974365, 20978365, 20978434, 20986365, 20990434, 20998365, 21002365, 21056395, 21060395, 21063184, 21063395, 21067184, 21070184, 21075395, 21191045, 21200045, 21219045, 21294414, 21311414, 21315414, 21324414, 21325414, 21330414, 21334414, 21340414, 21491056, 21493056, 21596354, 21603435, 21604435, 21606435, 21608435, 21610435, 21614435, 21646086, 21668086, 21812514, 21823514, 21826514, 21836304, 21839304, 21852304, 22310186, 22378026, 22380026, 22398294, 22401294, 22405085, 22412385, 22418026, 22418385, 22419026, 22470524, 22471524, 22472524, 22479524, 22483524, 22486524, 22523204, 22525264, 22531204, 22559135, 22568135, 22572135, 22578135, 22579135, 22586135, 22602135, 22603135, 22608135, 22642493, 22647493, 22682076, 22908334, 22921334, 22961354, 23166495, 23169495, 23173495, 23175495, 23182495, 23371455, 23378455, 23443264, 23445264, 23448264, 23581244, 23602244, 23737136, 23738136, 24021335, 24029335, 24231144, 24238144, 24248144, 24381324, 24478515, 24735144, 24746144, 24750144, 24772085, 24773085, 24865155, 24867155, 24870155, 24990084, 24991084, 24993084, 24996084, 25023034, 25027034, 25522465, 25525465, 25530465, 25532465, 25538465, 25600465, 25618106, 26287114, 26528095, 26547095, 26553095, 26569464, 26571095, 26572095, 26584095, 26588464, 26592464, 27865034, 28478495, 28519495, 29019044, 29023044, 29029044, 29031044, 29032044, 29512216, 29514216, and 29522216.
Alternative Methods of Compliance (AMOCs)
(f) The Manager, Boston Aircraft Certification Office (ACO), FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. Send information to

FOR FURTHER INFORMATION CONTACT Solomon Hecht, Aerospace Engineer, Boston Aircraft Certification Office, 12 New England Executive Park, Burlington, MA 01803; telephone: (781) 2387159; fax: (781) 2387170.