1AD/B737/11 - Horizontal Stabilizer Centre Section - Rear Spar Upper Chord Attach Lugs

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/B737/11 Horizontal Stabilizer Centre Section - Rear

Spar Upper Chord Attach Lugs

10/86

Applicability: All 737-100, -200 and -200C models with Line Numbers 316 to 322, and 325 and subsequent.

Requirement: Inspect in accordance with the Flight Safety Inspection Program specified in Boeing S.B. 737-55-1033.

Note: FAA AD 86-12-05 refers.

Compliance: (a) Before exceeding 40,000 landings; or

(b) Before exceeding 40,000 landings after a chord replacement or modification in accordance with Option 1 of the Requirement Document,

whichever is the later, and thereafter at intervals not exceeding 5,700 landings.

Background: Cracks in the lugs, if undetected, could lead to loss of the horizontal stabilizer.