# SDR ASAA2016111818746

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 18, 2016
- Submitted: November 21, 2016
- Operation: Air carrier
- Aircraft: [N479AS](https://openairdocs.org/aircraft/N479AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 60576
- Aircraft time: 5,520 hours, 1,807 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Duct
- Part number: 332A239012
- Condition: Damaged
- Location: Nr 1 Engine
- 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/ASAA2016111818746

## Discrepancy

REF T/C 78472000, NR 1 ENGINE, NOSE COWL TAI DUCT AT 12 O'CLOCK STRUT AREA HAS DAMAGE/TORN INSULATION BLANKET. GROUNDED, YES. REMOVED AND REPLACED NR 1 ENGINE INLET COWL TAI DUCT ASSY, REF PP BUILD-UP MANUAL 71-00-02. OPS AND LEAK TEST GOOD, REF B737-900 AMM 30-21-11-400-801. STEPS I AND J.

---
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.