EXPORT CONTROLLED RollsRoyce
250B17F SERIES OPERATION AND MAINTENANCE
WARNING: THE MAXIMUM OIL CONSUMPTION IS 1 QUART IN FIVE HOURS. OPERATION IN
EXCESS OF THIS LIMITS IS NOT PERMITTED. EXCESSIVE OIL CONSUMPTION
CAN BE INDICATIVE OF A SERIOUS INTERNAL OIL LEAK. AN INTERNAL OIL LEAK
CAN RESULT IN AN UNDETECTED INTERNAL OIL FIRE, WHICH WILL RESULT IN A
DISASTROUS TURBINE FAILURE.
CAUTION: NORMAL ENGINES USE A MINIMAL AMOUNT OF OIL. HOWEVER, ANY SUDDEN
INCREASE IN OIL CONSUMPTION IS INDICATIVE OF OIL SYSTEM PROBLEMS AND
MUST BE CORRECTED. REFER TO ITEMS 20 AND 21 IN TABLE 101, 720000
TROUBLESHOOTING.
Maximum oil consumption . . . . . . . . . . . . . . . . . . . . . . . 1 qt in 5 hr (0.9 liter in 5 hr)
Additional performance ratings . . . . . . . . . . . . . . . . . . . See Tables 3, 4 and 5
WARNING: TO PREVENT ENGINE FUEL SYSTEM CONTAMINATION, WHICH COULD CAUSE
ENGINE FLAMEOUT, AN EXTERNAL LOW PRESSURE FUEL FILTER SHOULD BE
USED ON ANY AIRCRAFT REFUELING FROM REMOTE FUELING SITES (DRUMS
ETC).
CAUTION: NOT ALL NO. 1 DIESEL FUELS, JP1, OR ARCTIC DIESEL FUELS WILL MEET THE
PRIMARY FUEL SPECIFICATIONS. IT IS THE RESPONSIBILITY OF THE OPERATOR
AND HIS SUPPLIER TO DETERMINE WHETHER OR NOT A GIVEN FUEL MEETS
THESE SPECIFICATIONS.
CAUTION: THERE IS NO TIME LIMIT FOR ENGINE OPERATION USING THE AVGASJET FUEL
MIXTURE AS LONG AS GRADE 80/87 AVGAS IS USED AND THE 1:2 VOLUME RATIO
IS OBSERVED. USE OF GRADE 100/130 (100L) AVGASJET FUEL MIXTURE SHALL
BE RESTRICTED TO 300 HOURS IN ONE OVERHAUL PERIOD DUE TO THE HIGH
LEAD CONTENT OF THE FUEL.
B. Fuel Specification
(1) Primary
Fuel conforming to the following military and commercial specifications are approved for
unrestricted use in 250 Series engines.
(a) MILT5624, grade JP4 and JP5
(b) MILT83133, grade JP8
(c) ASTM D1655, Jet B
(d) ASTM D1655, Jet A or A1
(e) JP1 fuel conforming to ASTM D1655, Jet A
(f) Arctic Diesel Fuel DFA (VVF800B) conforming to ASTM D1655, Jet A or Jet A1
(g) Diesel #1 fuel conforming to ASTM D1655, Jet A
720000
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EXPORT CONTROLLED RollsRoyce
250B17F SERIES OPERATION AND MAINTENANCE
Table 602 (cont)
Item Inspection/Maintenance Action Reference Initial
100 Hour Inspection (cont)
17 Inspect and clean pressure oil tube screen assembly. N/A
18 Measure oil flow from the scavenge passage or external sump Para 6.D.,
of the power turbine support and from gas producer turbine 725000,
support.
Record actual flow here:
GP__________PT__________
19 Inspect, clean and check magnetic drain plugs. Para 10.H.,
720000
Engine Servicing
20 Inspect the start counter for proper operation (increase in N/A
count) and for loose, chafed, frayed or broken wires and loose
connectors.
21 (250B17F/1 only) Inspect the electrical harness for loose, N/A
chafed, frayed or broken wires and loose connectors.
22 Check the condition of the bleed valve gasket (without remov- N/A
ing bleed valve). Replace gasket if air leaks (blowouts) can be
detected.
23 Inspect the outer combustion case for condition. Inspect the Para 2.B.,
weld joints of cases that do not have the brazed screen rein- 724000
forcement in the armpit area.
24 Clean the burner drain valve. Para 3.A.,
724000
25 Inspect the ignition lead for burning, chafing, or cracking of Para 2., 742002
conduit and loose connectors and broken lockwire.
26 Review engine records for compliance with all mandatory bulle- N/A
tins, inspections and airworthiness directives.
27 Review engine records for time or cycle limited parts, compo- N/A
nents, accessories or modules.
28 Enter component changes, inspection compliance, etc., in log- N/A
book as required.
720000
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May 1/02
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EXPORT CONTROLLED RollsRoyce
250B17F SERIES OPERATION AND MAINTENANCE
Table 602 (cont)
Item Inspection/Maintenance Action Reference Initial
300 Hour Inspection (cont)
CAUTION: INSPECTION FREQUENCY SHALL BE BASED ON THE NATURE OF THE EROSIVE
AND/OR CORROSIVE ENVIRONMENT. THE OPERATING ENVIRONMENT MAY DICTATE A
MORE FREQUENT INSPECTION INTERVAL. FOR NONCOATED COMPRESSOR
WHEELS, THE INSPECTION SHALL NOT EXCEED 300 HOURS OR 6 MONTHS. FOR
COATED COMPRESSOR WHEELS, INSPECTION SHALL NOT EXCEED 300 HOURS OR 12
MONTHS. IF ANY PARENT METAL IS EXPOSED DUE TO CORROSION AND/OR
EROSION, THE INSPECTION REQUIREMENT SHALL REVERT BACK TO 300 HOURS OR 6
MONTHS.
30 Inspect the compressor case when operating in an erosive PARA 1.C.(9),
and/or corrosive environment. this Section
CAUTION: WHEN THERE IS EVIDENCE THAT THE FUEL PUMP FILTER HAS BEEN BYPASSED, THE
GAS PRODUCER FUEL CONTROL INLET FILTER, THE FUEL NOZZLE FILTER, THE
GOVERNOR FILTER AND THE HIGH PRESSURE FUEL FILTER, IF APPLICABLE, MUST BE
CLEANED. (REFER TO SPECIAL INSTRUCTIONS, TABLE 603) IF ANY CONTAMINATION
IS FOUND IN THE FUEL NOZZLE FILTER, THIS WILL REQUIRE THAT THE FUEL
CONTROL BE SENT TO AN AUTHORIZED REPAIR FACILITY FOR INTERNAL CLEANING.
REFERENCE MUST ALSO BE MADE TO THE AIRFRAME MAINTENANCE MANUAL FOR
FUEL SYSTEM MAINTENANCE FOLLOWING FUEL CONTAMINATION.
31 If the aircraft is equipped with an engine fuel filter differential PARA 1.F.,
pressure warning system, replace the throwaway filter only 731001
when an indication of contamination is obtained or every 300
hours, whichever comes first. If the aircraft is not equipped
with a differential pressure warning system, replace the fuel
filter every 300 hours unless operating experience demon-
strates that smaller time increments are advisable.
32 Perform a fuel pump bypass valve operational check whenever PARA 1.D.,
a fuel filter is replaced. 731001
33 Purge air from the filter bowl area of the single element pump. PARA 2.F.,
730000
34 Inspect and clean the fuel nozzle. If no airframe mounted fuel PARA 2.A.,
filter is installed, inspect the fuel nozzle filter. PARA 3.A.,
731003
35 Inspect and clean the No. 1 bearing oil pressure reducer. PARA 3.A.(2),
723000
36 Visually inspect turbine external sump. Clean internal carbo- PARA 6.E.(4),
nous deposits from sump. 725000
37 Inspect the power turbine support scavenge strut. Clean inter- Para 6.E.,
nal carbonous deposits from strut. 725000
38 Remove, clean and inspect Pc filter every 300 hours or earlier PARA 2.A.,
as engine performance dictates. 732003
720000
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