AD 88-22-09

88-22-09 BOEING: Amendment 39-6054. Applies to Models 727 and 737 series airplanes, certificated in any category. Compliance required as indicated, unless previously accomplished.

To prevent attempted takeoff with the airplane in the improper configuration and the takeoff warning system inoperative, accomplish the following:

A. Prior to the accumulation of 200 flight hours after the effective date of this AD and thereafter at intervals not to exceed 200 flight hours, perform an operational and functional check of the takeoff configuration warning system in accordance with the established and approved procedures in Section 31-26-0 of the FAA-approved Boeing Model 727 or Model 737 Maintenance Manual, as appropriate. Repair or replace any inoperative component before further flight.

NOTE: The following items are to be included in the required checks:

1. Throttle Switch(s)- assure proper contact 2. Flap position switches 3. Elevator out of green band switches 4. Speed brake switch 5. APU door switch (if installed) 6. Leading edge slat switches 7. Air/Ground Relay

B. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region.

NOTE: The request for alternate means of compliance should be forwarded through an FAA Principal Maintenance Inspector (PMI), who may add any comments and then send it to the Manager, Seattle Aircraft Certification Office.

C. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD.

All persons affected by this directive who have not already received the appropriate service information from the manufacturer may obtain copies upon request to the Boeing Commercial Airplane Company, P.O. Box 3707, Seattle, Washington 98124. This information may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or Seattle Aircraft Certification Office, FAA, Northwest Mountain Region, 9010 East Marginal Way South, Seattle, Washington.

This amendment, 39-6054, becomes effective November 10, 1988.