SDR P5CA0200693

Service difficulty report · Inu · Boeing 747283B

Difficulty date: July 2, 2002
Submitted: August 2, 2002
Operation: Air carrier
Aircraft: N921FT
Make and model: Boeing 747283B
Aircraft serial: 21575
Aircraft time: 57,523 hours, 12,929 cycles
System (JASC): 3441 · Inertial Guidance System
Part: Inu
Part number: 7886580011A2
Part serial: 115
Condition: Failed
Location: Cockpit
Stage of operation: CR
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

DOUBLE INS FAILURE WHILE EN ROUTE. NR 3 INS HAD WARNING LIGHT, ACTION CODE 02, MALFUNCTION CODE 56 - BECAME 35 MILES OFF TRACK (CODES CLEARED) NR 3 INS HAD RED WARNING LIGHT, ACTION CODE 01, MALFUNCTION CODES 13, 31, 34, 35, 36, 42, 50 & 62. F/O'S ADI RED FLAG. INS TURNED OFF. REMOVED & REPLACED BOTH NR 3 & 2 INS NAV UNITS. OPS CHECK ON BOTH UNITS NORMAL PER MM 34-41-03.