2.  
Normal maximum cabin differential pressure................ 7.77 ± .3 psi

3.  
Supply air pressure maximum regulating .......................... 27 ± 2 psi

4.  
High pressure bleed regulating (air conditioning).............. 21 ± 2 psi

5.  
The cabin altitude warning light activates at a cabin altitude of............................................9,500 (+500-0) feet

Temporary RevisionMD-80 Sec. 1 Page 8 Flight Manual Continental Rev. 01-02  05/30/01
APU
Limitations
1.  
Maximum continuous EGT...........................................................677. C

2.  
Maximum transient overload EGT ...............................................710. C

3.  
Maximum starting EGT (for 30 seconds).....................................760. C

4.  
Maximum RPM...............................................................................110%

5.  
APU generator AC loadmeter maximum load:

Ground operation..............................................................................1.25
Inflight below 25,000 feet................................................................... 1.0
Inflight at and above 25,000 feet ........................................................ 0.7

6.  
The APU bleed air switch must be off  for all inflight operations.

7.  
When starting engines with the APU supplying pneumatic pressure, the respective air conditioning supply switch must be off.

8.  
Do not operate the APU at altitudes above ...........................35,000 feet

Operating Parameters
1.  
APU fuel consumption................................................................350 pph

2.  
APU starter duty cycle:  Two consecutive start attempts (maximum of 90 seconds each) followed by 5 minutes off, then a third attempt (maximum of 90 seconds) followed by 60 minutes off.

3.  
Following a self-initiated (automatic) shutdown of the APU, it is recommended that no attempts be made to restart the APU until the cause of the automatic shutdown has been determined and corrected.

Autopilot
Limitations:

1.
Minimum altitude to engage autopilot on departure: ...1,000 feet AGL

2.
Minimum altitude with autopilot engaged on approach:

Visual Approach.......................................................500 feet AGL
Non-precision approach.................................. 50 feet below MDA
ILS coupled approach using ILS mode....................... 70 feet AGL
ILS coupled approach using Autoland mode .............. 50 feet AGL

3.
The autopilot must be disconnected if an engine fails when the autopilot is engaged in takeoff mode. The autopilot may be reengaged after the aircraft is retrimmed.

4.
Do not use the autopilot on final approach (past the FAF) when operating single engine.

5.
Do not initiate or continue a missed approach with a failed engine when the autopilot is engaged.

6.
Do not conduct an ILS coupled (or autoland) approach if the autopilot AP TRIM light is on in excess of 3 seconds after the airplane is stabilized and tracking the glideslope.

7.
When using the autopilot, the Captain or the First Officer must be in his/her seat with the safety belt fastened.

8.
The autoland system is limited to the following:

headwind......................................................................... 25 knots
crosswind ........................................................................ 15 knots
tailwind ........................................................................... 10 knots

9. The autoland preflight test must be completed prior to any flight on any DFGC to be used for an autoland approach.
(Continued)
10. Do not conduct autoland operations if:
Align (ALN) mode is not annunciated on the FMA by 100 feet radio
altimeter.
Either engines becomes inoperative at an altitude greater than 50 feet

above the runway.
Auto ground spoilers are not armed and operational.
Any unusual control position or other abnormal condition exists in

manual flight control system.
RUDDER CONTROL MANUAL is annunciated.
11. The accuracy of the Performance Management System (PMS) has not been demonstrated.  Therefore, airplane range calculations and fuel management must not be predicted on its use.
Autothrottles
Limitations
Aircraft 870, 880, 882, & 885 only:  The autothrottles must be disengaged during approach before reaching 50 feet AGL.
　
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