P&W 72-00, Pages 527/528, 528C/528D, May 1/99; 528A/528B, 528E/528F May 1/96 EHAUST GAS TEMPERATURE EXHAUST GAS TEMPERATURE
JT8D-17
STARTING OVERTEMPERATURE
LIMITS AND INSPECTION PROCEDURES

°F °C
1184  640 - 
1139 1076  615 - 580 - 
1022  550 -

1 
REGARDLESS OF DURATION OF EXHAUST GAS OVERTEMPERATURE, DISASSEMBLE HOT SECTION AND SUBMIT ALL PARTS TO NORMAL INSPECTION PROCEDURES, INCLUDING 1ST STAGE TURBINE BLADES FOR STRETCH AND INSPECTION OF TURBINE DISKS FOR GROWTH AND HARDNESS. 
2 3 
REGARDLESS OF DURATION OF EXHAUST GAS OVERTEMPERATURE, DETERMINE AND CORRECT CAUSE OF OVERTEMPERATURE. ENTER INTO ENGINE LOG. VISUALLY INSPECT EXTERIOR OF ENGINE AND INTERIOR OF EXHAUST DUCT. 
NO ACTION REQUIRED 

JT8D-17A
STARTING OVERTEMPERATURE
LIMITS AND INSPECTION PROCEDURES

°F °C
1229 665 -
1184 640 -
1121 605 -
1067 575 -
1 
REGARDLESS OF DURATION OF EXHAUST GAS OVERTEMPERATURE, DISASSEMBLE HOT SECTION AND SUBMIT ALL PARTS TO NORMAL INSPECTION PROCEDURES, INCLUDING 1ST STAGE TURBINE BLADES FOR STRETCH AND INSPECTION OF TURBINE DISKS FOR GROWTH AND HARDNESS. 
2 3 
REGARDLESS OF DURATION OF EXHAUST GAS OVERTEMPERATURE, DETERMINE AND CORRECT CAUSE OF OVERTEMPERATURE. ENTER INTO ENGINE LOG. VISUALLY INSPECT EXTERIOR OF ENGINE AND INTERIOR OF EXHAUST DUCT. 
NO ACTION REQUIRED 

FOR EXHAUST GAS TEMPERATURE IN EXCESS OF 1184°F (640°C) JT8D-17 AND 1229°F (665°C) JT8D-17A RECORD THE EGT AND DURATION. REGARDLESS OF DURATION INSPECT PER P&WA 72-00 A/T.
FOR A DURATION OF 5 SECONDS OR LESS REGARDLESS OF EXHAUST GAS OVERTEMPERATURE, DETERMINE AND CORRECT THE CAUSE OF THE OVERTEMPERATURE. PERFORM A THOROUGH FLEXIBLE TYPE BORESCOPE INSPECTION OF THE COMBUSTION AREA AND HIGH AND LOW PRESSURE TURBINE AREAS. PAY PARTICULAR ATTENTION TO THE BLADES AND VANES. ENTER INTO ENGINE LOG. VISUALLY INSPECT THE EXTERIOR OF THE ENGINE AND THE INTERIOR OF THE EXHAUST DUCT.
FOR A DURATION EXCEEDING FIVE SECONDS REGARDLESS OF EXHAUST GAS OVERTEMPERATURE, DETERMINE AND CORRECT CAUSE FOR THE OVERTEMPERATURE AND PERFORM A HOT SECTION INSPECTION OR ALTERNATIVE FLEXIBLE FIBEROPTIC BORESCOPE INSPECTION.
554  Engine Starting and Operating Limitations 
May 01/00  Figure 205 (Sheet 2)  71-09-100 
Page 218A 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

JT8D-17, -17A
OVERTEMPERATURE LIMIT AND INSPECTION PROCEDURE
(EXCEPT STARTING)

°F °C
EXHAUST GAS TEMPERATURE
1292 700 -
1256 680 -
1220 660 -
1202 650 -
DISCARD ALL 1ST AND 2ND STAGE TURBINE BLADES AND ALL 2ND AND 3RD STAGE TURBINE VANES IF METALLOGRAPHIC INSPECTION SHOWS THAT THE BLADE OR VANE METAL TEMPERATURE WENT HIGHER THAN 2000°F (1093°C). ALL TURBINE PARTS MUST GET THE USUAL INSPECTION PROCEDURES, INCLUDING 1ST STAGE TURBINE BLADE STRETCH AND INSPECTION OF TURBINE DISKS FOR GROWTH AND HARDNESS. 
OVERHAUL OF THE HOT SECTION, REAR COMPRESSOR DRIVE TURBINE, AND FRONT COMPRESSOR DRIVE TURBINE WILL BE NECESSARY. GIVE ALL TURBINE PARTS THE USUAL INSPECTION PROCEDURES, INCLUDING 1ST STAGE TURBINE BLADE STRETCH AND INSPECTION OF TURBINE DISKS FOR GROWTH AND HARDNESS. 
FOR DURATION OF 5 SECONDS OR LESS, DETERMINE AND CORRECT THE CAUSE OF OVERTEMPERATURE. VISUALLY CHECK EXHAUST DUCT, AND REAR OF LOW TURBINE FOR BURNING, DISTORTION, METAL PARTICLES OR EVIDENCE OF UPSTREAM BLADE AND/OR VANE DAMAGE. INSPECT ENGINE INLET FOR EVIDENCE OF BLADE OR VANE DAMAGE. REPEATED OVERTEMPERATURES OR OVERTEMPERATURES LONGER THAN 5 SECONDS REQUIRE HOT SECTION INSPECTION OR AN ALTERNATIVE FLEXIBLE FIBEROPTIC BORESCOPE INSPECTION (P&W 72-00 I/C). REGARDLESS OF DURATION, DETERMINE AND CORRECT CAUSE OF OVERTEMPERATURE. 
TRANSITORY PERIODS DURING THE FIRST 2 MINUTES OF NORMAL TAKEOFF REQUIRE NO ACTION. BEYOND 2 MINUTES REQUIRES A COMPLETE HOT SECTION INSPECTION. 
NO ACTION REQUIRED 

P&W 72-00, Pages 532A/532B, May 1/96; 532C/532D, May 1/99
Engine Starting and Operating Limitations  554 
71-09-100  Figure 205 (Sheet 3)  May 01/00 
Page 218B 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

9.  Engine Start Procedure
A.  Start Engine (Ground Low Pressure or APU Air Source)
CAUTION:  DURING FREEZING CONDITIONS CHECK FOR ICE IN ENGINE INLET AND EXHAUST. TURN COMPRESSOR BY HAND AND CHECK FOR FREE ROTATION. IF ICE IS PRESENT, PREHEAT ENGINE WITH AIR HEATER UNTIL COMPRESSOR ROTOR TURNS FREELY.
(1)  
Perform Engine Operation Preparations in par. 3 and Engine Prestart Procedure in par. 7.
　
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