Engine Overtemperature Inspection Requirements
(Ground and In Flight Starting, and Engine Operation Below Idle Speed)
Figure 205 (Sheet 2)
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OVERTEMPERATURE - DURING ENGINE OPERATION (MINUTES)
EXHAUST GAS TEMPERATURE (T14.95) (SEE NOTE 3)
(PEAK TEMPERATURE)
AND UP
`C
680
675
670
665
660 655 650 645 640 635 630 625
0
AND UP SEE NOTE 2
TIME - MINUTES
TIME OF OVERTEMPERATURE - MINUTES
(TOTAL TIME ABOVE TAKE-OFF OR MAXIMUM CONTINUOUS LIMIT)
TAKE - OFF LIMIT, MAXIMUM REVERSE LIMIT.
MAXIMUM CLIMB, MAXIMUM CONTINUOUS LIMIT. CONTINUOUS OPERATION IS PERMITTED AT OR BELOW THIS LIMIT.
NOTE 1: THE TAKE-OFF LIMIT IS APPLICABLE FOR THE FIRST FIVE MINUTES (FROM THE START OF TAKE-OFF). AFTER FIVE MINUTES, THE MAXIMUM CLIMB, MAXIMUM CONTINUOUS LIMIT IS APPLICABLE FOR NORMAL OPERATION. THE TAKE-OFF LIMIT CAN BE EXTENDED FOR 10 MINUTES FOR EMERGENCY IN SERVICE USE.
NOTE 2: SEE SHEET 4 OF THIS FIGURE IF TIME OF OVERTEMPERATURE IS IN THE 0 TO 60 SECOND RANGE.
NOTE 3: EEC OUTPUT EGT TEMPERATURE INCLUDES 4`C SHUNT. FOR ENGINES PRE-PW-SB 73-166, ADD 4`C TO TEMPERATURE LIMITS.
PW V
Engine Overtemperature Inspection Requirements (Engine Operation at or above Idle Speed) Figure 206 (Sheet 1)
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
CHART NO. OF
5
INSPECTION REQUIREMENTSAREA INCIDENTS
1-15
6 (1) Make a record of these items: (1) Engine Serial No., (2) Max Temperature, (3) Time the EGT was over the limit (Takeoff or Max Continuous) (4) Steady-state or Surge Conditions
(2) Do the visual inspection as follows:
A. Examine the exhaust sleeve, exhaust plug, and the area to the rear of the low pres-
tion, and metal particles. Examine for signs of distress on the turbine blades or vanes.
B. If the inspection is not satisfactory, do
A
the borescope inspection (AMM 72-00-00/ 601, Engine Gaspath Inspection).
(3) Correct the cause of the overtemperature with the procedure on Engine Parameters Abnormal (FIM 71-00-00/101, Fig. 103).
sure turbine for burned residue, distor-
INSPECTION (AMM 72-00-00/601) AND THE HOT SECTION INSPECTION (AMM 72-00-00/601)
SHOW NO VISUAL DAMAGE.
Engine Overtemperature Inspection Requirements
(Engine Operation at or Above Idle Speed)
Figure 206 (Sheet 2)
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