# SDR CALA2025090908675

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 6, 2025
- Submitted: September 9, 2025
- Operation: Air carrier
- Aircraft: [N37538](https://openairdocs.org/aircraft/N37538), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 64467
- Aircraft time: 10,287 hours, 3,381 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Packing
- Part number: M832481222
- Part serial: NA
- Condition: Broken
- Location: Left Pack
- Stage of operation: TO
- How discovered: O
- Nature of condition: O
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2025090908675

## Discrepancy

LEFT WING BODY OVERHEAT AT 90 KNOTS ON THE TAKE OFF ROLL CREW DEBRIEF:  THRUST REVERSERS DEPLOYED DURING HIGH ENERGY STOP.   STOP WAS IN THEIR LOW BRAKING SCALE AT 90KTS, SPOILERS DEPLOYED, THRUST REVERSERS DEPLOYED, & AUTO BRAKE USED. INTEROGATED OMF. FOUND NO CORRELATED MAINT MESSAGES. STARTED FIM TASK FOR NITROGEN GEN OVHT FAULT REF MAINT MESSAGE 26-F0738 - FAULT ISOLATION 26-18 TASK 837. FOUND NGS HEAT EXHANGER UNIT LEAKING & COUPLING HYDRAFLOW CLAMP. REMOVED NGS PRESSURE REG. VALVE FOR ACCESS LT PACK BAY AFT. REPLACED BOTH PACKINGS AT AFT OF NGS HEAT EXCHANGER CONNECTION DUCT & REINSTALLED DUCT IAW 47-32-03-400-801. REINSTALLED RAM AIR VALVE INSTALLATION REF TASK 47-32-05-400-801, REQUIRES SYS LEAK TEST. ACCMPLISHED NGS SYS TEST REF 47-00-00-800-801. TEST PASSED. DURING LEAK CHK OF NITROGEN GEN SYS REF 47-00-00-790-801. NO LEAK NOTED

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