FAA Approved Airplane Flight Manual Supplement

Hawker Beechcraft B300 and B300C King Air 190-00716-03 Rev.3
Page 16 of 139 FAA APPROVED
POWER PLANT LIMITATIONS AND INDICATOR MARKINGS
No changes were made to the airplane’s engine operating limits. The engine gauges are marked as
shown in the following table. Refer to the latest Airplane Flight Manual or appropriate Airplane Flight
Manual Supplement for engine and propeller limitations.
NOTE
The gauge indicator pointer and digital display will flash inverse red/white video for 5
seconds, then remain steady red, if the indicated engine parameter exceeds its
established limit. The gauge indicator digital display will change to yellow for “caution”
conditions.
OPERATING
PARAMETER
PT6A-60A ENGINES COLOR MARKINGS & RANGES
Red Arc/Radial
(Minimum Limit)
Green Arc
(Normal)
Yellow Arc
(Caution)
Red Arc/Radial
(Maximum Limit)
Torquemeter (%) -- 0 to 100 (a) -- 100 (b)(c)
ITT (ºC) -- 400 to 820 (d) -- 820 (e)(f)
Prop N
2
(RPM) -- 1050 to 1700 (g) -- 1700 (h)(i)
Gas Generator N
1
(%) -- 62 to 104 -- 104
Oil Temperature. (ºC) (k) -- 0 to 99 -- 99
Oil Pressure (psi) (j) 60 90 to 135 60 to 90 135
Footnotes:
(a) Torque limit applies within range of 1000 - 1700 propeller RPM (N
2
). Below 1000 RPM, torque is
limited to 62%
(b) Torque indications between 100% and 156% are time limited to 20 seconds.
(c) To account for power setting accuracy and steady state fluctuations, inadvertent torque excursions up
to 102% is time limited to 7 minutes.
(d) Maximum ITT during idle is 750ºC. High ITT at ground idle may be corrected by reducing accessory
load and/or increasing N
1
RPM.
(e) ITT indication between 820ºC and 850ºC is time limited to 20 seconds.
(f) ITT starting limit at 1000ºC (red triangle) is time limited to 5 seconds.
(g) Maximum reverse propeller operation is limited to 1650 RPM N
2
speed.
(h) Propeller (N
2
) speeds between 1735 RPM and 1870 RPM are time limited to 20 seconds.
(i) To account for power setting accuracy and steady state fluctuations, inadvertent propeller RPM
excursions up to 1735 RPM are time limited to 7 minutes.
(j) Normal oil pressure is 90 to 135 psi at gas generator speeds above 72%. With engine torque below
62%, minimum oil pressure is 60 psi at normal oil temperature (60 degrees to 70 degrees C).
Oil pressures under 90 psi are undesirable. Under emergency conditions, to complete a flight, a
lower oil pressure limit of 60 psi is permissible at a reduced power, not to exceed 62% torque. Oil
pressures below 60 psi are unsafe and require that either the engine be shut down or a landing be
made at the nearest suitable airport, using the minimum power required to sustain flight.
Fluctuations of plus or minus 10 psi are acceptable.
During extremely cold starts, oil pressure may reach 200 psi (red triangle). In flight, oil pressures
above 135 psi but not exceeding 200 psi are permitted only for the duration of the flight.
(k) Oil temperature limits are -40ºC and +110 ºC. However, temperatures between 99ºC and 110 ºC
are limited to a maximum of 10 minutes.