The rudder system redesign is likely to eliminate the need for procedures dealing with jammed or restricted flight control conditions, but retrofit of the hardware on existing airplanes will take several years to complete. During this time, procedures for jammed or restricted flight control conditions will continue to be necessary. The ETEB determined that the AFM procedure addressing a jammed or restricted rudder required by AD 962607 is inadequate and must be revised. During evaluations of the existing procedure, the ETEB determined that flight crews were confused by the procedure and were not always able to complete it during simulated rudder system malfunctions. Therefore, the FAA has determined that a revised procedure titled ``Uncommanded Rudder,'' in lieu of the existing procedure titled ``Jammed or Restricted Rudder,'' is necessary in the interim period to ensure airplane safety.
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Explanation of Requirements of Rule

Since an unsafe condition has been identified that is likely to exist or develop on other airplanes of this same type design, this AD supersedes AD 962607 to require revising the AFM procedure in the existing AD to simplify the instructions for correcting a jammed or restricted flight control condition.

Interim Action

This is considered to be interim action. As previously stated, once the rudder system is redesigned, and the retrofitted rudder is approved and available, the FAA may consider additional rulemaking.

Determination of Rule's Effective Date

Since a situation exists that requires the immediate adoption of this regulation, it is found that notice and opportunity for prior public comment hereon are impracticable, and that good cause exists for making this amendment effective in less than 30 days.

Comments Invited

Although this action is in the form of a final rule that involves requirements affecting flight safety and, thus, was not preceded by notice and an opportunity for public comment, comments are invited on this rule. Interested persons are invited to comment on this rule by submitting such written data, views, or arguments as they may desire. Communications shall identify the Rules Docket number and be submitted in triplicate to the address specified under the caption ADDRESSES. All communications received on or before the closing date for comments will be considered, and this rule may be amended in light of the comments received. Factual information that supports the commenter's ideas and suggestions is extremely helpful in evaluating the effectiveness of the AD action and determining whether additional rulemaking action would be needed.

Submit comments using the following format:

Comments are specifically invited on the overall regulatory, economic, environmental, and energy aspects of the rule that might suggest a need to modify the rule. All comments submitted will be available, both before and after the closing date for comments, in the Rules Docket for examination by interested persons. A report that summarizes each FAApublic contact concerned with the substance of this AD will be filed in the Rules Docket.

Commenters wishing the FAA to acknowledge receipt of their comments submitted in response to this rule must submit a selfaddressed, stamped postcard on which the following statement is made: ``Comments to Docket Number 2000NM325AD.'' The postcard will be date stamped and returned to the commenter.

Regulatory Impact

The regulations adopted herein 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. Therefore, it is determined that this final rule does not have federalism implications under Executive Order 13132.

The FAA has determined that this regulation is an emergency regulation that must be issued immediately to correct an unsafe condition in aircraft, and that it is not a ``significant regulatory action'' under Executive Order 12866. It has been determined further that this action involves an emergency regulation under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979). If it is determined that this emergency regulation otherwise would be significant under DOT Regulatory Policies and Procedures, a final regulatory evaluation will be prepared and placed in the Rules Docket. A copy of it, if filed, may be obtained from the Rules Docket at the location provided under the caption ``ADDRESSES.''

List of Subjects in 14 CFR Part 39

Air transportation, Aircraft, Aviation safety, Safety. Adoption of the Amendment

Accordingly, pursuant to the authority delegated to me by the Administrator, the Federal Aviation Administration amends part 39 of the Federal Aviation Regulations (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. Section 39.13 is amended by removing amendment 399871 (62 FR 15, January 2, 1997), and by adding a new airworthiness directive (AD), amendment 3911948, to read as follows:
20002202 Boeing: Amendment 3911948. Docket 2000NM325AD.

Supersedes AD 962607, Amendment 399871.

Applicability: All Model 737 series airplanes, certificated in any category.

Compliance: Required as indicated, unless accomplished previously.

To ensure that the flight crew is advised of the procedures necessary to address a condition involving a jammed or restricted rudder, accomplish the following:
RESTATEMENT OF CERTAIN REQUIREMENTS OF AD 962607:
(a) Within 30 days after January 17, 1997 (the effective date of AD 962607, amendment 399871): Revise the Emergency Procedures Section of the FAAapproved Airplane Flight Manual (AFM) to include the following recall item, which will enable the flight crew to take appropriate action to maintain control of the airplane during an uncommanded yaw or roll condition. This may be accomplished by inserting a copy of this AD in the AFM.
``UNCOMMANDED YAW OR ROLL
RECALL
Maintain control of the airplane with all available flight controls. If roll is uncontrollable, immediately reduce angle of attack and increase airspeed. Do not attempt to maintain altitude until control is recovered. If engaged, disconnect autopilot and autothrottle.''

FOR FURTHER INFORMATION CONTACT Steve O'Neal, Aerospace Engineer, Flight Test Branch, ANM160S, Seattle Aircraft Certification Office, FAA, 1601 Lind Avenue, SW., Renton, Washington 980554056; telephone (425) 2272699; fax (425) 2271181.