# SDR CALA2024070101935

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 29, 2024
- Submitted: July 2, 2024
- Operation: Air carrier
- Aircraft: [N48127](https://openairdocs.org/aircraft/N48127), registered now
- Make and model: Boeing 757224
- Aircraft serial: 28968
- Aircraft time: 94,485 hours, 23,473 cycles
- System (JASC): [7700 · Engine Indicating System](https://openairdocs.org/jasc/7700)
- Part: Adc
- Part number: 4040800912
- Part serial: 4099
- Condition: Intermittent
- Stage of operation: CL
- How discovered: O
- Nature of condition: G, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2024070101935

## Discrepancy

LEFT AND RIGHT EEC INS IN THE ALTERNATE MODE EEC BIT #1&2 BOTH HAVE F0 D6 ED.  PERFORM FIM 73-21TREE802 AND AMM 73-21-00-902-001-R01 #1&2 EEC BITE BOTH #1&2 NO FO FAULTS NOW F1 FAULT D6. ENGINES BOTH FO D6 FAULT INDICATES DIFFERENCE OF 252 FT. ALT L/R ADC''S REF. L/P8452657 DISCREPANCY. RESET EEC AND LIMITER SWITCHS TO NORMAL. RAN #1&2 ENGINES LIGHTS REMAIN EXT. NO EICAS MSG..

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