# SDR ASAA2017121222957

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 12, 2017
- Submitted: December 20, 2017
- Operation: Air carrier
- Aircraft: [N579AS](https://openairdocs.org/aircraft/N579AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35187
- Aircraft time: 41,063 hours, 12,247 cycles
- System (JASC): [7331 · Fuel Flow Indicating](https://openairdocs.org/jasc/7331)
- Part: Transmitter
- Part number: 1853M48P03
- Part serial: FEC18028
- Condition: Defective
- Location: Nr 1 Engine
- Part time: 33,782 hours, 10,565 cycles
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017121222957

## Discrepancy

NR 1 ENGINE TREND DATA SHOWS A SUDDEN SHIFT IN CRUISE DELTA FUEL FLOW INDICATION ERRORS ARE SUSPECT. GROUNDED - YES. REMOVED & REPLACED NR 1 ENGINE FUEL FLOW TRANSMITTER REF AMM 79-31-01. PERFORMED LEAK CKS, OPS CKS AND EEC BITE CKS. ALL CKS GOOD, NO DEFECT NOTED.

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