Operations Manual Bulletin
for
International Lease Finance Corp.
The Boeing Company Seattle, Washington 98124-2207
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 CONTROL non-normal checklist.
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.
THE FOLLOWING PROCEDURE AND/OR INFORMATION IS EFFECTIVE UPON RECEIPT
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 1of2
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
Effective Pages will be updated in a future revision.
Remove and replace pages in your QRH as follows:
Remove Page No. Date Insert Page No. Date
NNC.9.1 November 15, 2000 NNC.9.1 November 15, 2000
NNC.9.2 November 15, 2000 NNC.9.2 March 15, 2001
Administrative Information
This bulletin replaces bulletin ILF2-50 dated November 15, 2000. Discard Bulletin ILF2-50. Revise the Bulletin Record to show ILF2-50 CANCELLED (CANC).
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 ILF2-50(R1) “Incorporated” (INC).
This condition is temporary until the system is modified. This bulletin will be revised to include Service Bulletin information when available.
CS3 2944
Page 2 of 2
Operations Manual Bulletin
for
International Lease Finance Corp.
The Boeing Company Seattle, Washington 98124-2207
Number: ILF2-51
Date: December 19, 2000 Document Effectivity: D6-30151-425 Subject: INCORRECT MANEUVERING SPEEDS FOR FLAP RETRACTION Reason: To inform flight crews of a revision to normal procedures to prevent
中國航空網 m.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：747-441 Operations Manual 747操作手冊(32)
