# SDR SWAA002026

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 12, 2000
- Submitted: November 2, 2000
- Operation: Air carrier
- Aircraft: [N509SW](https://openairdocs.org/aircraft/N509SW), registered now
- Make and model: Boeing 737-5H4
- Registry model: [Boeing 737-5H4](https://openairdocs.org/model/boeing-737-5h4) (OpenAirDocs)
- Aircraft serial: 24186
- Aircraft time: 32,765 hours, 3,298 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Valve
- Part number: 56697
- Condition: Vibrates
- Location: Fwd Fuselage
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA002026

## Discrepancy

AIR TURNBACK, FLUTTERING SOUND IN COCKPIT DURING CLIMBOUT.  PACKS TURNED OFF AIRSPEED BELOW 200 KTS AND ENG POWER ADJ.  STILL FLUTTERING.  REMOVED AND REPLACED EQUIPMENT COOLING VALVE AND C/W AIRFRAME VIBRATION CONDITIONAL INSPECTION.

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