Commonwealth legislation

AD/B727/136 Amdt 2 - MLG Door Actuator Rib Fitting and Attach Bolts

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Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

4/10 complexity

This Airworthiness Directive requires operators of Boeing 727 aircraft to follow FAA AD 97-02-09: inspect the main landing gear (MLG) door actuator rib fitting for cracking (expanded inspection area), take specified follow-on actions, and ultimately replace aluminium actuator rib fittings with new steel fittings until that replacement is done (Requirement; Compliance). Operators pay for inspections, repairs and replacements; the Civil Aviation Safety Authority enforces compliance for Model 727s (Applicability; Background).

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AD/B727/136 Amdt 2 - MLG Door Actuator Rib Fitting and Attach Bolts

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Boeing 727 Series Aeroplanes

AD/B727/136

Amdt 2

MLG Door Actuator Rib Fitting and Attach Bolts

6/97

Applicability: Model 727 series aircraft.

Requirement: Action in accordance with the technical requirements of FAA AD 97-02-09 Amdt 39-9894.

Note: Boeing Service Bulletins 727-32-0364, 727-32-0383 Revision 1, and 727-32A0399 refer.

Compliance: As specified in the Requirement Document with a revised effective date of 22 May 1997; until replacement of the aluminium actuator rib fittings with new steel actuator rib fittings in accordance with Part III of the Accomplishment Instructions of Boeing Alert Service Bulletin 727-32A0399.

This Airworthiness Directive becomes effective on 22 May 1997.

Background: The FAA received reports of loose main landing gear actuator attach fitting bolts that allowed movement of the fitting, which jammed the gear door and prevented full extension of one main gear; resulting in a landing with that gear partially extended.

Amendment 1 responded to an FAA AD which reassessed the corrective actions that were in place.

Amendment 2 is issued in response to a new FAA AD which supersedes two existing AD’s, and requires inspections to detect cracking in an expanded area of the actuator rib fitting, and various follow-on actions. A report was received of a fractured rib fitting that had been reworked in accordance with one of the existing ADs.

Amendment 1 of this Airworthiness Directive became effective on 1 April 1993.

The original issue of this Airworthiness Directive became effective on 12 December 1991.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.

1 AD/B727/136 Amdt 2 - MLG Door Actuator Rib Fitting and Attach Bolts