# SDR AALA201912319003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 29, 2019
- Submitted: December 31, 2019
- Operation: Air carrier
- Aircraft: N201UU
- Make and model: Boeing 757-2B7
- Registry model: [Boeing 757-2B7](https://openairdocs.org/model/boeing-757-2b7) (OpenAirDocs)
- Aircraft serial: 27810
- Aircraft time: 79,568 hours, 26,761 cycles
- Engine: Rroyce RB211535E4
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Nut
- Condition: Loose
- Location: Pf Air Sys
- Stage of operation: CL
- How discovered: O
- Nature of condition: S
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201912319003

## Discrepancy

AIRCRAFT WAS GROUNDED: PILOT REPORTS ENG 1 FF 20% ABOVE ENG 2. 103.5% N1 REQUIRED ENG 1 CLIMB FL340, ENG 2 94% N1. MAINTENANCE FOUND LEAK IN PF SYS AIR TUBING. FOUND NUT LOOSE IAW IPC 77-11-53-02 FIG 02 ITEM 95. TIGHTENED AND SAFTIED NUT. OPERATED ENG 1 AND ENG 2 AT SAME POWER SETTINGS UP TO CLIMB POWER IAW AMM 71-00-00. ALL PARAMETERS MATCHED.

---
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.