# SDR 2000UALA00166

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 2, 2000
- Submitted: October 4, 2000
- Operation: Air carrier
- Aircraft: N376UA
- Make and model: Boeing 737322
- Aircraft serial: 24641
- Aircraft time: 31,669 hours, 21,538 cycles
- Engine: Ge CFM56*
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Duct
- Condition: Damaged
- Location: Equipment Cool
- Stage of operation: NR
- 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/2000UALA00166

## Discrepancy

EQUIPMENT SUPPLY COOLING ALTERNATE LIGHT CAME ON IN FLIGHT AND EFIS SCREENS WENT BLANK (LOST COLOR).  COLOR CAME BACK (LIGHT WENT OUT), FOLLOWING RETURN TO THE AIRPORT.  *S/D*  FOUND ORIFICE ASSEMBLY MISSING FROM EFIS COOLING SUPPLY DUCT.  INSTALLED MISSING ORIFICE ASSEMBLY.

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