# SDR SWAA2019102138024

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 20, 2019
- Submitted: October 21, 2019
- Operation: Air carrier
- Aircraft: N933WN
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36640
- Aircraft time: 36,298 hours, 21,892 cycles
- Engine: Cfmint CFM567B243
- System (JASC): [7320 · Fuel Controlling System](https://openairdocs.org/jasc/7320)
- Part: Hmu
- Part number: 442369
- Part serial: BECW1740
- Condition: Faulty
- Location: Nr 2 Engine
- Stage of operation: DE
- How discovered: O
- Nature of condition: F
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2019102138024

## Discrepancy

LEVELING OFF AFTER INITIAL DESCENT. AUTO THROTTLES TURNED OFF AND MAXIMUM N1 WAS 75% AT FL 300. MAX N1 CONTINUED TO DROP WITH DESCENT, 51% AT 10,000. / R&R #2 ENGINE HYDRO MECHANICAL UNIT PER AMM.

---
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.