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974°C (not to be exceeded under any operating conditions).
(4)
Hung start:
If not greater than 30% rpm, within 60 seconds.
LIMITATIONS Power Plant Vol. 1 02.05.13
Oct 05/06
13. AUXILIARY POWER UNIT (CONT'D)
D. Starting: (Cont’d)
(5) APU starting and operation is permitted within the following operating envelope:
.
Temperature – Refer to Figure 02–04–1.
.
Altitude and Airspeed – Refer to Figure 02.05.4.
(6)
In-flight start:
In-flight starting is guaranteed at altitudes up to 20,000 feet.
E.
APU Bleed Air
(1)
Engine-start during ground operations up to 15,000 feet:
(a)
No bleed air extraction limitation. Each engine may be started using the APU as a bleed air source.
(b)
If both engines are to be started using the APU bleed air, then the operating engine’s thrust must not exceed 70% N2.
(2)
Engine-start during flight:
(a)
During single engine operations, APU bleed air extraction for an engine start is not permitted.
(b)
During double engine failure conditions, APU bleed air extraction for engine starts is permitted.
Inflight APU main engine starts have been demonstrated to 15,000 feet.
(3)
Air Conditioning:
(a)
Bleed air extraction from the APU is not permitted above 15,000 feet.
F.
APU Generator
The maximum permissible load on the APU generator in flight is 30kVA.
G. APU Indications
The APU limit display markings on the EICAS must be used to determine compliance with the maximum/minimum limits and precautionary ranges. If EICAS markings show more conservative limits than those specified below, the limit markings on the EICAS should be used.
LIMITATIONS Power Plant Vol. 1 02.05.14
Oct 05/06
13. AUXILIARY POWER UNIT (CONT'D)
APU In-Flight Envelope
Figure 02.05.4
LIMITATIONS Operating Speeds Vol. 1 02.06.1
Oct 05/06
1. MAXIMUM OPERATING SPEED AND MACH NUMBER
Maximum operating limit speeds as given in Figure 02.06.1, must not be deliberately exceeded in any regime of flight (climb, cruise or descent), unless a higher speed is specifically authorized for flight test or training operations.
Maximum Operating Speed and Mach Number Figure 02.06.1
2. RVSM MAXIMUM OPERATING SPEED
The maximum cruise mach number during flight in RVSM airspace is 0.83.
LIMITATIONS Operating Speeds Vol. 1 02.06.2
Oct 05/06
3. DESIGN MANEUVERING SPEED
Full application of rudder and aileron controls as well as maneuvers that involve angles of attack near the stall, must be confined to speeds below VA. Values of VA are given in Figure 02.06.2, for varying pressure altitudes and airplane weights.
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