# SDR IPXA10B60034

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 23, 2010
- Submitted: May 26, 2010
- Operation: Air carrier
- Aircraft: [N577UP](https://openairdocs.org/aircraft/N577UP), registered now
- Make and model: Boeing 747-44AF
- Registry model: [Boeing 747-44AF](https://openairdocs.org/model/boeing-747-44af) (OpenAirDocs)
- Aircraft serial: 35666
- Engine: Ge CF680C2B1F
- System (JASC): [7320 · Fuel Controlling System](https://openairdocs.org/jasc/7320)
- Part: Hmu
- Part number: 442329
- Part serial: BECK4779
- Condition: Fluctuates
- Location: Nr 2 Engine
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA10B60034

## Discrepancy

AT CRUISE, NR 2 ENGINE N1 VARIES BETWEEN 90.5 AND 91.0 EGT AND N2 NOTICEABLE FLUCTUATIONS AS WELL.  C/O T/S FOR FRM CODE 730, 381 02 IAW FIM 73-03-00-812-839-J00. R & R HMU IAW AMM 73-21-14/401 LEAK CHECK WAS PERFORMED. NO LEAKS NOTED.

---
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.