Service difficulty report · Unknown · Gulstm GIV

Difficulty date
June 24, 2016
Submitted
June 30, 2016
Operation
Air carrier
Aircraft
N489QS
Make and model
Gulstm GIV
Aircraft serial
1389
Aircraft time
12,838 hours, 6,456 cycles
Engine
Rroyce TAY6118
System (JASC)
7603 · Power Lever
Part
Unknown
Condition
Malfunctioned
Location
Power Lever
Stage of operation
AP
How discovered
O
Nature of condition
O
Precautionary procedure
B

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

What was found

POWER LEVERS HARD STUCK IN IDLE ON FINAL APPROACH. THRUST REVERSERS WERE DOWN AND AUTOTHROTTLES WERE OFF. VERY HARD PUSH TO GET LEVERS TO MOVE FWD. AFTERWARD LEVERS OPERATED NORMAL. PERFORMED A VISUAL INSPECTION OF THE THROTTLE QUADRANT AND ALL AUTOTHROTTLE SWITCHES FOR DAMAGE OF ANY KIND. NONE FOUND. PERFORMED WIRING CONTINUITY CHECKS BETWEEN THE AUTO THROTTLE ENGAGE/DISENGAGE SWITCHES AND DISCONNECT SWITCHES AND THE PERFORMANCE COMPUTER. NO DEFECTS FOUND. PERFORMED THE GUST LOCK SYSTEM-OPERATIONAL TEST (CMP 277011). CHECKED GOOD. PERFORMED THE AUTO-THROTTLE OVERRIDE-FUNCTIONAL CHECK LT & RT. CHECKED GOOD. PERFORMED THE THROTTLE LEVER GUST LOCK PROTECTION- FUNCTIONAL TEST. CHECKED GOOD. PERFORMED PERFORMANCE MANAGEMENT SYSTEM NR 1 & NR 2 OPS CHECK GOOD. PERFORMED LT AND RT AUTO-THROTTLE SERVO- OPS CHECK & VERIFIED ON ENGINE RUNS WITH AUTO-THROTTLE ENGAGED CHECKED GOOD. VERIFIED DURING ENGINE RUNS WITH THE AUTO-THROTTLE ENGAGED THAT THE AUTO-THROTTLE DISCONNECT SWITCHES ON THE THROTTLES LEVERS FUNCTIONED PROPERLY BY DISCONNECTING THE AUTO-THROTTLE SYSTEM WHEN DEPRESSED.