What was found
BOTH PACKS FAILED AFTER TAKEOFF. UNABLE TO PRESSURIZE. EMERGENCY DECLARED. LANDING UNEVENTFUL. FOUND LT & RT DIFFERENTIAL PRESSURE SWITCH WIRES SHORTED TO GROUND. REPAIRED WIRES IAW SWPM 20-10-01. OPS CHECKED NORMAL.
- Difficulty date
- March 21, 2015
- Submitted
- March 24, 2015
- Operation
- Air carrier
- Aircraft
- N9409F
- Make and model
- Doug DC983
- Aircraft serial
- 53121
- Aircraft time
- 60,870 hours, 32,885 cycles
- System (JASC)
- 2197 · Air Conditioning System Wiring
- Part
- Wire
- Condition
- Shorted
- Location
- Pressure Switch
- Stage of operation
- CL
- How discovered
- O
- Nature of condition
- G
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.