# SDR UIEA2021083001915

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 28, 2021
- Submitted: September 1, 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: 93,844 hours
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Relay
- Part number: BACR13G2AB
- Condition: Inoperative
- Location: Lt A/C Pack
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2021083001915

## Discrepancy

LEFT PACK TEMP AUTO CONTOL INOP ( PACK TEMPERATURE CONTROL SYSTEMS (-200/-300) , AUTO MODE )(<P>T/S TO FAULTY LF PACK AUTO/MANUAL RELAY K57. REMOVED AND REPLACED RELAY 57 AS PER SWPM 20-81-22 AND SSM 21-50-03 AND PERFORMED OPS CHECK OF LF PACK COOLING SYSTEM PER 21-52-200 AND NO FAULTS NOTED. THIS ACTION CLEARS MDDR 152624</P>)

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