# SDR UIEA2021032100657

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 23, 2021
- Submitted: March 29, 2021
- Operation: Air carrier
- Aircraft: [N640GT](https://openairdocs.org/aircraft/N640GT), registered now
- Make and model: Boeing 767-3S1
- Registry model: [Boeing 767-3S1](https://openairdocs.org/model/boeing-767-3s1) (OpenAirDocs)
- Aircraft serial: 25221
- Aircraft time: 92,656 hours, 19,742 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Sensor
- Part number: 56B3A
- Condition: Inoperative
- Location: Heat Exchanger
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2021032100657

## Discrepancy

COCKPIT  ON EICAS ECS PAGE "L PACK PRIIM HEAT EX IN"  SHOWS  NO DATA      P/N  MS 28034-1(<P>REMOVED/REPLACED L PRJ. HEAT EXCHANGER INLET TEMP SENSOR AND OPS CHECK OK AMM 21-52-08.<BR /></P>)

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