Service difficulty report · Module · Boeing 737900ER

Difficulty date
September 21, 2023
Submitted
September 22, 2023
Operation
Air carrier
Aircraft
N37466
Make and model
Boeing 737900ER
Aircraft serial
31644
Aircraft time
34,236 hours, 12,219 cycles
Part
Module
Part number
C17001DA01
Part serial
7121
Condition
Faulty
Location
Sta 198.2
Part time
27,925 hours, 10,113 cycles
Stage of operation
CL
How discovered
O
Nature of condition
O
Precautionary procedure
A

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

What was found

PER FLIGHT CREW: IAS DISAGREE FOLLOWED BY AIRSPEED SLOW ON CAPTAINS SIDE, DID NOT GET STICK SHACKER. STANDBY AND FO''S SIDE WERE SAME WITH AIRSPEED AND SETTINGS DISPLAYINGPROPERLY. RAN CHECKLIST AND IAS DISAGREE EXTINGUISHED. CAPTS SIDE ACCUATE FOR ABOUT 5 MINS. A/T WORKED FOR A BIT THEN DROPPED OFF AND IAS DISAGREE DISPLAYED AGAIN. COMPLIED WITH INSPECTIONS REF GMM 09-10-05 QUICK DISCONNECT AND LEAK CHECK GOOD. TPAQC U112769.. FOUND CAP''T PITOT ADM HOSE SPINNING AT THE METAL TUBE CONNECTION SUSPECT LEAK. NEED HOSE ASSY PN B394DDB0106D M&E 29-3411-3-0010. NEED TO REPLACE CAPT''S PITOT ADM PRECAUTIONARY M&E 42-3413-9-0001. REMOVED AND REPLACED CAPT''S PITOT ADM AND HOSE PER AMM TASK 34-21-04-000-801 AND 34-21-04-400-801. PERFORMED LEFT PITOT SYSTEM LEAK TEST PER 34-11-00-790-810 TEST PAST. INSTALLATION TASK ACCOMPLISHED FROM STEP A TO STEP E(2). FOR THE LAST STEP MODULE, AIR DAT OFF 42-3413-9-0001 7121 ON 42-3413-9-0001 2981 MODULE, AIR DAT OFF 42-3413-9-0001 7121 ON 0000 NEED TO PERFORM LAND VERIFY PER AMM 22-11-00-201. NOTE: ADM AND HOSE WERE ROBBED FROM A/C 0470. PARTS USED: 42-3413-9-0001,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1918493 SN OFF 7121 LAND VERIFY TEST COMPLETED REF L/P 5810651 LAND VERIFY TEST WILL BE ACCOMPLISHED WITH AUTO GENERATED LOG PAGE. LOG PAGE WILL BE UPDATED HERE TO REFLECT RESULTS. TO RESTORE AIRCRAFT TO FULL AUTOLAND STATUS, A CAT II/III GROUND RECERTIFICATION TESTS MUST BE PERFORMED BY A (CAT) QUALIFIED MAI NTENANCE TECHNICIAN. N

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