SDR HALA2017072400206

Service difficulty report · Adc · Boeing 76733A

Difficulty date: July 22, 2017
Submitted: July 24, 2017
Operation: Air carrier
Aircraft: N583HA
Make and model: Boeing 76733A
Aircraft serial: 25531
Aircraft time: 103,807 hours, 18,630 cycles
System (JASC): 3417 · Air Data Computer
Part: Adc
Part number: 4040800912
Part serial: 82070205
Condition: Malfunctioned
Location: First Officer'S
Part time: 8,566 hours, 1,727 cycles
Stage of operation: CR
How discovered: O
Nature of condition: N
Precautionary procedure: A

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

What was found

AT FL 350, CAPTAIN`S ALTIMETER READ 35,000, FIRST OFFICER'S READ 34,850, 150FT SPLIT. CORRECTED ITSELF WHEN FIRST OFFICER SELECTED ALT AIR DATA SWITCH. TESTED CAPTAIN`S AND FIRST OFFFICER`S SYSTEMS WITH AIR DATA TESTER. F/O SIDE READS 40 FT LOW. REPLACED THE FIRST OFFICER`S ADC IAW AMM 34-12-00. PERFORMED MCDP TEST 30. TEST PASSED. OK FOR SERVICE.

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