SDR IPXA11M64662

Service difficulty report · Adc · Doug MD11F

Difficulty date: February 8, 2011
Submitted: February 9, 2011
Operation: Air carrier
Aircraft: N277UP
Make and model: Doug MD11F
Aircraft serial: 48578
System (JASC): 3417 · Air Data Computer
Part: Adc
Condition: Inoperative
Location: Cockpit
Stage of operation: CL
How discovered: O
Nature of condition: J
Precautionary procedure: O

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

What was found

AFTER T/O AIRSPEED DIFF OF 15KNTS CAPTAIN'S LOWER THAN F/O. DURING CLIMB AIRSPEED CLOSED TO WITHIN 5 KNOTS, CAPTAIN ALWAYS LOWER. AMBER IAS ALERT. PERFORMED PITOT STATIC LEAK CHECK IAW AMM 34-11-00-2, LEAK CHECK WAS GOOD, FOUND A SPLIT BETWEEN CAPT'S AND F/O'S AIRSPEED INDICATION. R & R NR 1 ADC IAW AMM 34-16-01-4 AND 34-16-01-5, ALL CHECKS ARE GOOD.

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