SDR ASAA2020093033294

Service difficulty report · Transition Panel · Boeing 737990ER

Difficulty date: September 30, 2020
Submitted: October 9, 2020
Operation: Air carrier
Aircraft: N472AS
Make and model: Boeing 737990ER
Aircraft serial: 60580
Aircraft time: 21,027 hours, 6,622 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Transition Panel
Part number: 146A750235
Condition: Corroded
Location: Bs 727-727i
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 CARGO COMPARTMENT TRANSITION PANEL CORRODED NUMEROUS PLACES, MARKED BS 727-BS 727I+10, LBL 22. GROUNDED-YES. REMOVED DAMAGE ON AFT CARGO TRANSITION PANEL FROM BS 727-727I +10 LBL 22. ORIGINAL THICKNESS .040, PER B737-900ER SRM 53-60-53-OI-2. REMOVED .017; MATERIAL REMAINING .023 AND FOUND TO BE OUT OF LIMITS, PER B737-900ER SRM 53-00-53-1A-2. REPAIRED DAMAGE SECTION OF TRANSITION PANEL FROM BS 727-727I +10, PER B737-900ER SRM 53-00-53-2R-5.