SDR CALA2025110510909

Service difficulty report · Vapor Barrier · Boeing 737924ER

Difficulty date: November 5, 2025
Submitted: November 5, 2025
Operation: Air carrier
Aircraft: N78448
Make and model: Boeing 737924ER
Aircraft serial: 40003
Aircraft time: 42,895 hours, 15,761 cycles
System (JASC): 5312 · Fuselage Main, Bulkhead
Part: Vapor Barrier
Condition: Cracked
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

CENTER WING REAR SPAR VAPOR WEB IN RT WHEEL WELL HAS CRACK RUNNING DIAGONALLY ACROSS PANEL DIRECTLY FWD OF HYDRAULIC HAND PUMP BRACKET. CRACK IS 8.5" LONG & TERMINATES AT TOP LT HOLE. PANEL IS FIBERGLASS & IS LOCATED BETWEEN RBL 45.64 AND 54.21. CRACK MEETS ADL LIMITS IAW SRM 57-10-10 PARA 2 & ALSO CAN BE INCLUDED IN REPAIR LIMITATIONS IAW ECRA 5710-02560. ACCOMPLISHED INTERIM REPAIR & ECRA. ECRA 5710-02560 PART 1 INTERIM REPAIR CARRIED OUT. INSPECTED INTERIM REPAIR PER EC/RA # 5710-02560 REV C.