SDR ASAA2026072267846

Service difficulty report · Transition Panel · Boeing 7379

Difficulty date: July 22, 2026
Submitted: August 11, 2026
Operation: Air carrier
Aircraft: N921AK
Make and model: Boeing 7379
Aircraft serial: 43337
Aircraft time: 17,690 hours, 5,109 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Transition Panel
Part number: 146A750021
Condition: Corroded
Location: Zone 100
Stage of operation: IN
How discovered: V
Nature of condition: O
Precautionary procedure: K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

AFT PIT LEFT TRANSITION PANEL UPPER AND LOWER SURFACE HAS CORROSION NUMEROUS PLACE BETWEEN BS747 AND BS727J+13. GROUNDED - YES. BLENDED AWAY CORROSION, ORIGINAL THICKNESS .040, MAT LOSS AT LOWEST .007 NEW THICKNESS .033, AREAS OUT OF LIMITS PER B737-MAX9 SRM 53-00-53-1A-2. COMPLETED REPAIR PER B737-MAX9 SRM 53-00-53-2R-5 SRM 51-40-02 AND BWDG 146A7500.

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