SDR ASAA2017042521028

Service difficulty report · Probe · Boeing 737890

Difficulty date: April 25, 2017
Submitted: June 12, 2017
Operation: Air carrier
Aircraft: N506AS
Make and model: Boeing 737890
Aircraft serial: 35690
Aircraft time: 33,758 hours, 10,301 cycles
Engine: Cfmint CFM567B27
System (JASC): 7720 · Engine Temperature Indicating System
Part: Probe
Part number: TC29604
Condition: Faulted
Location: Nr 2 Egt
Stage of operation: IN
How discovered: 9
Nature of condition: O
Precautionary procedure: K

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

What was found

NR 2 ENGINE BITE SHOWS FAULT 77-10852 BOTTOM RIGHT EGT. ECONOMIC FAULT. ACFT GROUNDED, OUT OF RANGE IAW FIM 77-21 TASK 802, FAULT 77-10852 SHOWS ACTIVE. REMOVED AND INSTALLED A NEW S2 EGT PROBE IAW AMM 77-21-01. PERFORMED NR 2 ENGINE EEC TEST SYS CHECKED NORMAL. NEW READINGS ARE S1= 43.59, S2=20.97, S3=22.55, AND S4= 40.09.