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Details

Limits
MH-53E Limits
120
Aviation
Professional
05/12/2011
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Term
Ng Starter dropout
 Definition
51-58%
Term
Ng starter driven speed
 Definition
26-32%
Term
Ng Idle
 Definition
60.5-70% variable with OAT
Term
Ng Normal
 Definition
60.5-101.1
Term
Ng Transient
 Definition
101.1-102.9 for 30 sec
Term
Ng Max
 Definition
101.1%
Term
Ng OEI
 Definition
105%
Term
Overspeed switch on, Wf reduced to
 Definition
75% Ng
Term
T5 possible post shutdown fire
 Definition
>320 deg C
Term
T5 Idle
 Definition
450-550 deg C
Term
T5 possible hot start
 Definition
>650 before idle
Term
T5 Max continuous
 Definition
769 deg C
Term
T5 Military
 Definition
810 for 30 min
Term
T5 Max
 Definition
829 for 10 min
Term
T5 momentary overtemp
 Definition
900 deg C for 1 min
Term
T5 OEI
 Definition
925 deg C in 2 min
Term
TQ precautionary
 Definition
100-137%
Term
TQ military
 Definition
121% for 30 min
Term
TQ 10 minutes
 Definition
137%
Term
TQ 1 min
 Definition
160%
Term
"Engine Overtorque"
 Definition
137 +/- 3%
Term
"Engine Overtorque" stays lit
 Definition
153-156%
Term
TQ OEI Max continuous
 Definition
100%
Term
TQ OEI 30 min
 Definition
121%
Term
TQ 10 min
 Definition
148%
Term
TQ OEI 2 min
 Definition
157%
Term
TQ OEI 1 min
 Definition
160%
Term
Nf <50,000
 Definition
100-105%
Term
Nf>50,000
 Definition
103-105%
Term
Nf Max
 Definition
110%
Term
Nf Overhaul
 Definition
>125% 5sec, 129%
Term
Engine Overspeed Activates
 Definition
110+/-2% Nf
Term
Engine Overspeed test switch
 Definition
95 +/- 2%
Term
Nr <50,000
 Definition
100-105%
Term
Nr > 50,000
 Definition
103-105%
Term
Nr Precautionary Ranges
 Definition
95-100 and 105-118%
Term
Nr max, overtorque fault
 Definition
118%
Term
Nr visual inspection required
 Definition
118-129%
Term
Nr >60,000 t/o
 Definition
105%
Term
Nr Autorotation Max
 Definition
110%
Term
Anti-flap restrainers and droop stops
 Definition
25% and 75% Nr
Term
Engine Oil Idle Temp
 Definition
45-55 deg C
Term
Engine oil normal temp
 Definition
40-135 deg C
Term
Engine oil transient temp
 Definition
135-145 deg C for 10 min of flt
Term
Engine oil max temp
 Definition
145 deg C
Term
"#1 and #3 engine anti ice", duct temp
 Definition
<35 deg C
Term
"Engine oil press low"
 Definition
10 +/- 3 psi
Term
"Engine oil pressure high"
 Definition
100 +/- 3 psi
Term
"Engine Oil pressure normal range"
 Definition
55-85 psi
Term
"Engine oil quantity low"
 Definition
< 25% capacity
Term
"#2 engine overheat"
 Definition
575 deg F
Term
NGB normal temp
 Definition
40-130 deg C
Term
NGB Max temp
 Definition
145 deg C
Term
"#1 and #3 NGB oil press"
 Definition
14 +/- 2 psi
Term
"#1 and #3 NGB oil hot"
 Definition
121 +/- 5.5 deg C
Term
MGB minimum pressure
 Definition
25 psi
Term
MGB normal pressure
 Definition
50-65 psi
Term
MGB max pressure
 Definition
150 psi
Term
"MGB aux lube pump"
 Definition
<14 +/- 2 psi
Term
"MGB oil pressure"
 Definition
<14 +/- 2 psi
Term
MGB normal temperature
 Definition
121 +/-5.5 deg C
Term
MGB oil cooler bypass temp and press differential
 Definition
<71 deg C and >25 psid
Term
EAPS scavenge blower operates
 Definition
14 psi
Term
"AGB oil hot"
 Definition
>145 deg C
Term
"AGB/IGB/TGB oil pressure"
 Definition
<7 +/- 1 psi
Term
"IGB chip"
 Definition
140 +/- 5.5 psi
Term
"TGB chip"
 Definition
140 +/- 5 psi
Term
high pressure rotor brake
 Definition
975 +/- 25 psi
Term
Low pressure rotor brake
 Definition
350 +/- 35 psi
Term
Rotor brake relief valve
 Definition
1300 psi
Term
Nr low pressure engagement of rotor brake
 Definition
25-50 +/-4%
Term
"Rotor brake pressure"
 Definition
> 10 psi
Term
"Rotor brake on"
 Definition
975 +/- 25 psi
Term
Spars pressurized with Nitrogen
 Definition
10 psi 18-24 deg C
Term
MRH RPM
 Definition
179 RPM
Term
T/R RPM
 Definition
699 RPM
Term
MRH AND TR diameter
 Definition
79 ft and 20 ft
Term
Wf Possible hotstart
 Definition
> 175 pph
Term
Wf idle
 Definition
200-350 pph
Term
range extension tank capacity
 Definition
285 gal
Term
no dumping ROD
 Definition
>1500 fpm
Term
Min. altitude for dumping
 Definition
6000 ft AGL
Term
Manual Transfer of fuel duration
 Definition
60 sec
Term
Auto transfer of fuel duration
 Definition
105 sec
Term
Mk-105 transfer rate
 Definition
3 gpm
Term
"Eng fuel boost"
 Definition
<8.5 +/- 0.5 psi
Term
"Eng filter bypass"
 Definition
>1.37 +/- 0.5 psi
Term
Fuel bypasses
 Definition
> 2.8 psi
Term
"#1 and #3 fuel low"
 Definition
544 lb (80 gal)
Term
"#2 fuel low"
 Definition
272 lb (40 gal)
Term
flow switches sense Wf at
 Definition
2+/-1 gpm
Term
1 tank dump rate
 Definition
135 gpm
Term
2 tank dump rate
 Definition
158 gpm
Term
pressure refueling psi range
 Definition
35-55 psi
Term
fuel transfer pump rate
 Definition
80 gpm
Term
"Purging" cycle rate
 Definition
8.5 min
Term
Primary Fuel Nozzle (12) primary and secondary pressure
 Definition
160 and 210 psi
Term
auto fuel transfer starts at
 Definition
5200 +/- 100 lb #1 and #3 engines
Term
auto fuel transfer ends
 Definition
3100 lb in #2 engine
Term
#1 and #3 fuel tank capacity
 Definition
914.5 gal
Term
#2 fuel tank capacity
 Definition
691.6 gal
Term
90 deg stub ramp AS
 Definition
Term
AS rear/sideward
 Definition
30 and 35 kts
Term
AS indicator unreliable
 Definition
<40 kts
Term
AS landing gear actuation
 Definition
130 kts
Term
AS fwd flt, gear down, EAPS closed
 Definition
150 kts
Term
AS externals
 Definition
150 kts
Term
AS Max autorotation
 Definition
120 kts
Term
AS landing gear t/d and t/o
 Definition
40 kts
Term
HAR AS range
 Definition
105-120 kts
Term
fuel dump AS range climb/level
 Definition
40-130 kts
Term
fuel dump AS range descent
 Definition
90-130 kts
Term
EAPS in auto, door opens at what AS
 Definition
>78-88 kts
Term
Max wind blade/pylon fold
 Definition
45 kts
Term
Max wind tied down properly
 Definition
60 kts
Term
Max wind rotor engagement/disengagement AS
 Definition
45 kts
Term
Position a/c into the wind
 Definition
>20 kts
Term
Max gross t/o weight
 Definition
69,750 lbs
Term
Max length
 Definition
99 ft .5 in
Term
Max height
 Definition
28 ft 4 in
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