# SDR ASAA1057284

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 23, 2010
- Submitted: January 26, 2010
- Operation: Air carrier
- Aircraft: [N590AS](https://openairdocs.org/aircraft/N590AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35687
- Aircraft time: 7,663 hours, 2,434 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [7320 · Fuel Controlling System](https://openairdocs.org/jasc/7320)
- Part: Hmu
- Part number: 1853M56P12
- Part serial: BECW5924
- Condition: Malfunctioned
- Location: Nr 2 Engine
- Part time: 7,663 hours, 2,434 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA1057284

## Discrepancy

CLIMBING THROUGH 21000 FT NR 2 ENG BEGAN SURGING AND N1 WENT INTO RED ARC THRUST WAS REDUCED AND ENGINE INDICATIONS WERE NORMAL THROUGH LANDING PERFORMED EEC BITE CHECK PER MM 71-00-00-700-808-F00.  FAULT CODE 73-20332 LOGGED ON NR 2 ENGINE.  PERFORMED ENG EXCEEDANCE CHECK PER MM 71 00 00. 740 801 FOO.  INSPECTED NR 2 ENG INLET & EXHAUST PER MM 71-00-00-800-804-F00 ITEM D1B.  NO DAMAGE NOTED.  NOTE ENG EXCEEDANCE PAGE INDICATED PEAK 104.9 RED 104.0 DURATION 0:00.6 PERFORMED BOROSCOPE INSPECTION OF THE STAGE 4 LPT BLADES NO DAMAGE NOTED M/M 72-00-00-200-809-FOO PAGE (7) (5)(5).  ACCOMPLISHED FIM TASK 73-25-00-810-802-FOO.  COMPLIED WITH EA 800 72EA 02784 STEPS 4 5 6 AND 7.  REPLACED HMU REFERENCE AMM 73-21-10-400-801-F00.  ACCOMPLISHED IDLE POWER LEAK CHECK.  LEAK CHECK GOOD REFERENCE AMM 71-00-00-700-801-F00.  ACCOMPLISHED ACTUATORS TESTS NO FAULTS NOTED REFERENCE AMM 71-00-00-700-807-F00 AND ENGINE RUN EEC BITE CHECK REFERENCE AMM 71-00-00-808-F00.

---
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.