AD 83-01-05 R2

83-01-05 R2 BOEING: Amendment 39-4542 as amended by amendment 39-5000 as further amended by amendment 39-5360. Applies to Models 727, 737-100, and 737-200 series airplanes certificated in any category.

Compliance required as indicated, unless already accomplished. To prevent undetected prolonged engine starter operation, accomplish the following:

A. Prior to February 23, 1986, unless already accomplished, install an FAA-approved system that will provide a positive indication to the flight crew of the normal and unwanted operation of each engine starter. Approval of any proposed system must be obtained from the FAA, Northwest Mountain Region, Seattle Aircraft Certification Office, 9010 East Marginal Way South, Seattle, Washington.

NOTE: When specific complying systems are approved by the Seattle Aircraft Certification Office, the FAA Flight Operations Evaluation Board will review the system(s) for master minimum equipment list (MMEL) consideration.

B. Concurrent with the incorporation of an indicating system described in paragraph A, the airplane manual required by Subpart G of Part 121 (14 CFR Part 121) or Subpart C of Part 125 (14 CFR Part 125) of the Federal Aviation Regulations shall be revised to include:

1. A provision that the flight crew verify that the cockpit indicating system, required by paragraph A, indicates that the starter is de-energized after each engine start; and

2. Crew procedures, i.e., verifying start switch "off," closing the bleed valve of the affected engine, shutting down the affected engine, etc., to be accomplished when unwanted starter operation is indicated during ground and flight operations.

C. Alternative means of compliance with this AD which provide an equivalent level of safety may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, 9010 East Marginal Way South, Seattle, Washington.

D. A special flight permit may be issued in accordance with FAR 21.197 and 21.199 for the purpose of flying an aircraft which has exceeded the compliance period to a maintenance facility where the modification can be performed.

Amendment 39-4542 (48 FR 2962; January 24, 1983) became effective February 28, 1983. Amendment 39-5000 (50 FR 6339; February 15, 1985) became effective February 23, 1985. This amendment 39-5360 becomes effective August 4, 1986.