SDR COEA2016042202804

Service difficulty report · Altimeter · Aerosp ATR42500

Difficulty date: April 22, 2016
Submitted: April 25, 2016
Operation: Air carrier
Aircraft: N804HC
Make and model: Aerosp ATR42500
Aircraft serial: 623
Aircraft time: 19,992 hours, 22,526 cycles
System (JASC): 3416 · Altimeter, Barometric/Encoder
Part: Altimeter
Part number: 4016341906
Part serial: 99119218
Condition: Frozen
Location: Cockpit
Part time: 37,935 hours, 35,150 cycles
Stage of operation: CL
How discovered: O
Nature of condition: J
Precautionary procedure: A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

FLIGHT 613, AIR TURN BACK. DURING CLIMB OUT AT APPROX 1,000 FT, FIRST OFFICER SIDE ALTIMETER FROZE & DISPLAYED THE OFF FLAG FOR APPROX 30 SECONDS. THIS REMOVED ALTITUDE INFORMATION FROM THE FLIGHT DIRECTOR. THE FAULT RETURNED AGAIN AT APPROX 3,500 FT FOR 30 SECONDS. 804HC RETURNED.

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