Commonwealth legislation

AD/B737/30 Amdt 2 - Engine Throttle Cable

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legislative instrument

Plain English Summary

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This airworthiness directive requires operators of Boeing 737‑300, ‑400 and ‑500 aeroplanes listed in Boeing SB 737‑76‑1023 to follow the FAA AD 91‑21‑13 technical action: inspections were increased and, by Amendment 2, a manufacturer modification is now required to stop accelerated throttle‑cable wear and a condition called “engine throttle cable ratcheting.” Operators must pay for and schedule the work; CASA enforces compliance and set a revised effective date of 12 January 1992.

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AD/B737/30 Amdt 2 - Engine Throttle Cable

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Boeing 737 Series Aeroplanes

AD/B737/30

Amdt 2

Engine Throttle Cable 1/92

Applicability: Model 737-300, -400 and -500 series, listed in Boeing SB 737-76-1023.

Requirement: Action in accordance with the technical requirement of FAA AD 91-21-13 Amdt 39- 8060.

Note: Boeing SB 737-76-1023 refers.

Compliance: As specified in the requirement document with a revised effective date of 12 January 1992 for Australian registered aircraft.

Background: Interference between the number two engine throttle cable and the adjacent right wing front spar bracket near station 124, has resulted in one throttle cable failure and a significant number of worn or frayed cables. This AD introduced an increased frequency inspection period until planned modification action by the manufacturer was available.

Amendment 1 was raised to include the 400 series aeroplane which was the subject of a new country of origin AD.

Amendment 2 to this Directive requires terminating action in lieu of repetitive inspections of the cable. The manufacturer has developed a modification which will eliminate the cable’s accelerated wear condition, and a condition referred to as “engine throttle cable ratcheting” which exists on each engine. The effective date required by the FAA is extended by approximately one month.

Source text

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

1 AD/B737/30 Amdt 2 - Engine Throttle Cable