# SDR IPXA2026081501707

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 16, 2026
- Submitted: August 18, 2026
- Operation: Air carrier
- Aircraft: [N455UP](https://openairdocs.org/aircraft/N455UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 25476
- Aircraft time: 46,102 hours, 22,631 cycles
- System (JASC): [4910 · APU Cowling/Containment](https://openairdocs.org/jasc/4910)
- Part: Skin
- Condition: Corroded
- Location: Zone 100
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2026081501707

## Discrepancy

APU COMPARTMENT TAIL CONE LOWER BILGE ALUMINUM HONEYCOMB SKIN PANELS BETWEEN BS 1963 & 1992 HAD AREAS OF CORROSION TO INCLUDE ATTACHMENT TO FRAMES WITH AREAS OF MISSING FINISH.   VERIFIED THE ABOVE STEP 17.   INSTALLATION OF LWR-BILGE-ALUMN-HONEYCOMB-SKIN-PANEL BTWN BS.1963 & 1992 AT APU-COMPART-TAIL-CONE IAW SRM 51-40-02-0G-0, & THE APPLICATION OF FILLET-SEAL ON LOWER BILGE, ALUMN-HONEYCOMB-SKIN PANEL BTWN BS 1963 & 1992 IAW AMM 51-31-01-392-039.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.