SDR NWAA093925648

Service difficulty report · Iru · Boeing 757251

Difficulty date: November 20, 2009
Submitted: November 23, 2009
Operation: Air carrier
Aircraft: N548US
Make and model: Boeing 757251
Aircraft serial: 26495
Aircraft time: 41,736 hours, 15,964 cycles
System (JASC): 3441 · Inertial Guidance System
Part: Iru
Condition: Malfunctioned
Location: Left
Stage of operation: DE
How discovered: O
Nature of condition: B
Precautionary procedure: O

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

What was found

AT TOP OF DESCENT A BURNING RUBBER-TYPE ODOR OCCURRED AT FL360. CREW RAN COM 2.26 PROCEDURE. SMOKE DISSIPATED BUT RETURNED JUST PRIOR TO TOUCHDOWN. IRS FAULT LIGHT NOTED AFTER LANDING. FLIGHT CONTINUED TO GATE WITHOUT FURTHER INCIDENT. MAINTENANCE SWAPPED LEFT AND RIGHT IRUS AND DEFERRED RIGHT IRU PER MEL 34-21-1F. MSP MAINTENANCE SWAPPED IRUS TO ORIGINAL POSITIONS AND REPLACED LEFT IRU. OPS CHECKED GOOD.