# SDR 2021F00154

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 7, 2021
- Submitted: September 7, 2021
- Operation: General aviation
- Aircraft: [N377AR](https://openairdocs.org/aircraft/N377AR), registered now
- Make and model: Boeing 737-86J
- Registry model: [Boeing 737-86J](https://openairdocs.org/model/boeing-737-86j) (OpenAirDocs)
- Aircraft serial: 37753
- Aircraft time: 36,418 hours, 16,653 cycles
- System (JASC): [5410 · Nacelle/Pylon, Main Frame](https://openairdocs.org/jasc/5410)
- Part: Acoustic Panel
- Part number: 31421003
- Part serial: 1464001
- Condition: Damaged
- Location: Rt Engine
- Part time: 60,642 hours, 40,398 cycles
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2021F00154

## Discrepancy

SCRATCH ON RIGHT ENGINE INNER BARREL ACOUSTIC PANEL INLET. DURING TRANSIT CHECK, IT WAS DETECTED A SCRATCH ON LEFT ENGINE INNER BARREL ACOUSTIC PANEL INLET PANEL. MAINTENANCE PERSONNEL PERFORMED A REVISION, DETECTING A SCRATCH ON LEFT ENGINE INLET COWL INNER BARREL ACOUSTIC SKIN PANEL AT 5:30 HRS POSITION ON THE AFT EDGE OF 1.250” LENGTH; THE SCRATCH ON INLET COWL INNER BARREL WAS EVALUATED IAW SRM 54-10-01, PARAGRAPH 4.C.2, FIGURE 103, DETAIL E AND IT WAS FOUND WITHOUT LIMITS; THE LEFT ENGINE INLET COWL ASSY WAS REPLACED IAW AMM 71-11-01/401, ALL CORRECT.

---
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.