Service difficulty report · Restrictor Valve · Boeing 737824

Difficulty date
January 9, 2021
Submitted
January 11, 2021
Operation
Air carrier
Aircraft
N36280
Make and model
Boeing 737824
Aircraft serial
31598
Aircraft time
53,607 hours, 19,268 cycles
Part
Restrictor Valve
Condition
Obstructed
Location
Lt Elevator
Stage of operation
CL
How discovered
O
Nature of condition
C, J
Precautionary procedure
A

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

What was found

FEEL DIFF PRESS LIGHT, PER FLIGHT CREW FEEL DIFF LIGHT EXTINGUISHED AFTER LANDING. PERFORMED FIM TASK 27-31-00-810-815 STEP E(7). CLEANED DEBRIS FROM LT ELEVATOR RESTRICTOR VALVE. UNABLE TO COMPLETE ISLOLATION PROCEDURE "C" LIFT EQUIP UNAVAILABLE 1-00-700-811. NOTE ALL FAULTS FOUND. 0-730-801 AND FEEL DIFFERENTIAL PRESSURE LIGHT TEST, PER AMM 27-3 -31-17-170-801 AND VERIFY PITOT HEATER OPERATION, PER AMM 30-31-0 TECH SUPPORT REQUEST: ALSO DO ELEV PITOT SYSTEM FLUSH, PER AMM 27 UPDATE: TEMPERATURE CHECK ON BOTH PITOT AND LEFT SIDE READS LITTLE LOWER THAN RIGHT 10 FEET AWAY. RIGHT SIDE READS. 137 DEGREE AND LEFT 128 DEGREE. JUST INFORMATION. PERFORMED ELEVATOR PITOT SYSTEM FLUSHING, PER AMM 27-31-17-170-801. CLEARED DEBRIS OUT OF LEFT ELEVATOR PITOT, OPERATIONS AND LEAK CHECKS GOOD. PERFORMED ELEVATOR PITOT HEATER TEST, PER AMM 30-31-00-730-801, CHECKS NORMAL. PERFORMED FEEL DIFFERENTIAL PRESSURE LIGHT TEST, PER AMM 27-31-00-700-811 SYSTEM OPERATES CORRECTLY W/NO FAULTS NOTED. OK FOR SERVICE.