What was found
MAJOR REPAIR. APU COMPARTMENT LT SIDEWALL INNER SKIN WAS DELAMINATED APPROX 8"X10" AREA BETWEEN BS 1918 AND 1941 17 INCHES ABOVE THE LWR FRAME. VERIFIED COMPLETION OF REPAIR IS A CATEGORY A REPAIR. NO FURTHER ACTION REQUIRED.
- Difficulty date
- January 4, 2026
- Submitted
- January 28, 2026
- Operation
- Air carrier
- Aircraft
- N410UP
- Make and model
- Boeing 75724APF
- Aircraft serial
- 23732
- Aircraft time
- 38,878 hours, 26,092 cycles
- System (JASC)
- 4910 · APU Cowling/Containment
- Part
- Skin
- Part number
- 148N3710
- Condition
- Delaminated
- Location
- Apu Bay
- 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.