SDR MEX2003003

Service difficulty report · Indicator · Doug DC982

Difficulty date: January 5, 2003
Submitted: January 29, 2003
Operation: Air carrier
Aircraft: N491SH
Make and model: Doug DC982
Aircraft serial: 49150
System (JASC): 3416 · Altimeter, Barometric/Encoder
Part: Indicator
Condition: Failed
Location: Cockpit
Stage of operation: NR
How discovered: 9
Nature of condition: O
Precautionary procedure: A

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

What was found

AIRCRAFT RETURNED TO PLATFORM DUE TO FIRST OFFICER ALTIMETER OFF FLAG. ALTIMETER WAS RESET BUT FLAG CONTINUES. BOTH CADCS WERE INTERCHANGED, TESTS WERE PERFORMED IAW MM. AFTER TESTS, 130 FT DIFFERENCE BETWEEN ALTIMETERS APPEARS. PNEUMATIC CONNECTIONS WERE DRAINED AND CLEANED, ALL OPERATED IN A CORRECT WAY.

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