# SDR ABXA20260414164

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 14, 2026
- Submitted: April 17, 2026
- Operation: Air carrier
- Aircraft: [N317CM](https://openairdocs.org/aircraft/N317CM), registered now
- Make and model: Boeing 767338
- Aircraft serial: 24317
- Aircraft time: 114,369 hours, 34,054 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Shutoff Valve
- Part number: 7998014
- Part serial: 900629
- Condition: Defective
- Location: Lt Engine
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ABXA20260414164

## Discrepancy

DURING TAXI AFTER ENG STARTS, NO PACK PRESSURE OBSERVED ON LT SIDE WITH ISOLATION SWITCHES CLOSED. ACFT RETURNED TO THE GATE (BTB) AND MTX GROUNDED A/C .  R & R LT ENG PRSOV IAW AMM 36-11-09.  PERFORMED VISUAL INSP TO LT ENG PRSOV CONNECTOR D22 IAW WDM 36-11-51. NO DISCREPANCIES NOTED. C/W L ENG PNEUMATIC SYST HEALTH CHECK, OPS CHKD IAW AMM 36-00-21/501 SYSTEM GOOD. PER T/S PURPOSE SWAPPED AIR SUPPLY CARD BETWEEN LT AND RT ENG IAW AMM 36-11-12/401. INSTALLATION TEST NORMAL. ACCOMPLISHED AIR SUPPLY SYS OPS CHKS ON LT & RT SIDES PER AMM 36-11-00 AND 71-00-00. ALL CHKS NORMAL. ISOLATION & PRESSURES NORMAL. NO MESSAGES. ACFT REMAINS ETOPS 180.  ACFT RETURNED TO SERVICE. GE, CF680C2B6

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