Limitations Flashcards
Low-end TRQ limit:
23.9 TRQ when below 1000RPM
Green range on TRQ:
0 - 36.9 TRQ
Yellow range on TRQ:
36.9 - 44.34 TRQ
Red range on TRQ:
44.34 TRQ, max limit 61.0 TRQ
Takeoff TRQ & limitation:
44.34 TRQ, 5 minutes
Max continuous TRQ & limitation:
36.95 TRQ, no time limit
Transient TRQ & limitation:
61.0 TRQ, 20 seconds
Max reverse TRQ & limitation:
34.25 TRQ, no time limit
Green range on ITT:
400 - 760 ITT
Yellow range on ITT:
760 - 800 ITT
Red range on ITT:
800 ITT / 1000 ITT (startup)
Max takeoff ITT & limitation:
800 ITT, limited to 5 minutes
Max continuous ITT & limitation:
760 ITT, no time limit
Minimum idle ITT & limitation:
750 ITT (applies between 50.7% and 61.4% NG)
Max starting ITT & limitation:
1000 ITT, 5 seconds
Max reverse ITT & limitation:
760 ITT, no limitation
Green range on Ng:
60 to 104%
Yellow range on Ng:
No yellow range
Red range on Ng:
Max/limit 104%
Max takeoff Ng & limitation:
104% (limited to 5 minutes; TRQ limit)
Max continuous Ng:
104%
Min idle Ng:
50.7% (Ground Idle)
64.0% (Flight idle)
Transient Ng:
104%
Max Np RPM takeoff & limitation:
1700 RPM (limited to 5 minutes; TRQ limit)
Max continuous RPM & limitation:
1700 RPM, no limit
Transient RPM & limitation:
1870 RPM, 20 seconds
Max reverse RPM & limitation:
1650 RPM, no limit
Ground prohibited range RPM:
350 - 950 RPM in stabilized operation
Green range oil PSI:
90 - 135 PSI
Yellow range oil PSI:
60 - 90 PSI
Red range oil PSI:
40 - 60 PSI
Normal oil pressure:
90 - 135 PSI (green arc) at >72% Ng
With engine TRQ below 35.87, oil pressure must be:
> 85 PSI at normal oil temperature
Rule of thumb with undesirable oil pressure:
Oil PSI should be above 90 PSI
When is 60 PSI oil pressure permissible? Under what condition?
At a reduced power not less than 23.9 TRQ.
Oil PSI takeoff range:
90 - 135 PSI
Max continuous oil PSI:
90 - 135 PSI
Minimum idle oil PSI:
60 PSI
Max starting oil PSI:
200 PSI
Transient oil PSI:
Overall limits! 40 - 200 PSI, limited to 20 seconds
Max reverse Oil PSI:
90 - 135 PSI
Green range oil temp:
10 - 105
Yellow range oil temp:
105 - 110
Red range oil temp:
110
Max takeoff oil temperature & limitation:
10 - 110, limited to 5 minutes (for TRQ)
Max continuous oil temp & limitation:
10 - 105, no limitation
Min idle oil temp range:
-40 to 110
Transient range oil temperature:
-40 - 110
Max reverse oil temp:
10 - 105
Transient ITT & limitation:
870 ITT, 20 seconds
Max MOR operation limitations:
Fuel flow: 512lbs/hr
Max TRQ: 30
