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• air conditioning packs shut down andPACK 1,PACK 2, andPACK 3
messages display (pressurization is gradually lost)
• air driven hydraulic pumps (ADPs) will be unpowered and respective HYD
PRESS DEM messages display when ADPs are commanded to run
• when flaps are selected, leading and trailing edge flaps operate in the
secondary mode (the FLAPS PRIMARY message displays)
• wing and nacelle anti-ice systems are inoperative
• thrust reversers are inoperative
• The >TRIM AIR OFF message displays.
Page 2 of 2
Operations Manual Bulletin No. ILF2-49, Dated July 5, 2000 (continued)
Depending upon environmental conditions, cabin and flight deck temperatures
can rise quickly. If necessary, remove as many sources of heat as possible by:
• turning off all in-flight entertainment systems
• turning off all galleys
• closing all window shades to block sunlight.
After descent to safe altitude, increase airflow throughout the airplane by:
• opening both outflow valves
• opening the smoke evacuation port
• if heat becomes excessive, opening a cabin door 1 and a cabin door 5.
The PACK 1, 2, 3 non-normal checklist has been revised to accommodate the
conditions of this anomaly.
Operating Instructions
If the EICAS messages PACK 1, PACK 2, and PACK 3 display simultaneously,
accomplish the revised PACK 1, 2, 3 non-normal checklist.
Operations Manual Information
The attached pages replace an entire Non-Normal Checklist section of your QRH.
The List of Effective Pages and Non-normal Checklists Index will be updated in
a future revision.
Remove Section 2 of Chapter NNC from your QRH and replace it with the
attached pages.
Administrative Information
Insert this bulletin behind the Operations Manual Bulletin Record page in Volume
1 of your Operations Manual. Amend the Operations Manual Bulletin Record to
show bulletin ILF2-49 “In Effect” (IE).
This condition is under investigation. This bulletin remains in effect until further
notice.
CS3 2911
Page 1 of 2
Sect Name Section Name
Operations Manual Bulletin
for
The Boeing Company
Seattle, Washington 98124-2207
International Lease Finance Corp.
Number: ILF2-50(R1)
Date: March 15, 2001
Document Effectivity: D6-30151-425
Subject: TRIPLE FLAP CONTROL UNIT (FCU) FAILURE
Reason: To inform flight crews of the effects of failure of all three FCUs. Bulletin
revised to provide additional information and forward a revised FLAPS
THE FOLLOWING PROCEDURE AND/OR INFORMATION IS EFFECTIVE UPON RECEIPT
Information in this bulletin is recommended by The Boeing Company, but may not be FAA approved
at the time of writing. In the event of conflict with the FAA approved Airplane Flight Manual (AFM),
the AFM shall supersede. The Boeing Company regards the information or procedures described
herein as having a direct or indirect bearing on the safe operation of this model airplane.
CONTROL non-normal checklist.
Background Information
An operator recently experienced in-flight failure of all three FCUs. Engineering
investigation has revealed intermittent failure of a leading edge flap position
sensing switch can result in failure of all three FCUs with the following
indications:
• the EICAS caution message FLAPS CONTROL displays
• primary and secondary flap control and position indication displays are
inoperative
• the alternate control mode remains operative, however the expanded flap
position indication does not display.
Additionally, the following other systems are affected:
• autopilots are inoperative
• flight director command bars may not display on the PFD
• flap maneuvering speeds do not display on the PFD
• outboard ailerons unlock
• engine idle is limited to approach idle
• stick shaker (stall warning) margins are reduced due to reversion to a
simplified maneuvering schedule
Page 2 of 2
Operations Manual Bulletin No. ILF2-50(R1), Dated March 15, 2001 (continued)
• GPWS warning “TOO LOW FLAPS” occurs at low altitude unless the
Ground Proximity Flap Override switch is selected to OVRD.
The FLAPS CONTROL non-normal checklist has been revised to accommodate
the additional information provided in this bulletin.
Operating Instructions
If the EICAS message FLAPS CONTROL displays, accomplish the revised
FLAPS CONTROL non-normal checklist.
NOTE: the 20 knot crosswind limit for landing has been removed from the revised
checklist.
Operations Manual Information
The attached pages replace pages in Chapter NNC of your QRH. The List of
　
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