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displayed values.
If this anomaly is observed, advise maintenance so FMC ACMS data can be
forwarded to Boeing for analysis.
Administrative Information
Insert this bulletin behind the Bulletin Record page in Volume 1 of your
Operations Manual. Amend the Bulletin Record to show bulletin ILF2-44(R1) IN
EFFECT (IE).
This condition is under investigation. This bulletin remains in effect until further
notice.
Mailing Address:Manager, Flight Technical Publications (747-400)
Boeing Commercial Airplane Group
P.O. Box 3707 MS 20-89
Seattle, WA 98124-2207
USA
Fax: (206) 662-7812
Telex: 32-9430 Station 627
SITA: SEABO7X
CS3 - 2793 Page 1 of 2
Sect Name
Operations Manual Bulletin
for
The Boeing Company
Seattle, Washington 98124-2207
International Lease Finance Corp.
Number: ILF2-45(R1)
Date: April 1, 2001
Document Effectivity: D6-30151-425
Subject: REQUIRED TIME OF ARRIVAL (RTA) FUNCTION ANOMALY
Reason: To inform flight crews of an FMC anomaly resulting from data link entry
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.
of an RTA clearance. Revised to add Service Bulletin information.
Background Information
There has been one reported occurrence of FMCs failing to display the FIX (1L)
on the RTA PROGRESS Page 3/3 after the flight crew loaded an RTA clearance
from an ATC data link message. The RTA (1R) displayed and the EXEC light
illuminated, however both FMCs subsequently restarted with loss of performance
data and the active flight plan.
Operating Instructions
This bulletin does not apply to airplanes modified by Boeing Service Bulletin 747-
34A2672 (FMC software load 15).
To prevent occurrence of the RTA function anomaly, manually enter all RTA data.
If the system does not accept and display FIX data, revert to non-RTA procedures
and inform Air Traffic Control.
Administrative Information
This bulletin replaces bulletin ILF2-45 dated March 12, 1999. Discard Bulletin
ILF2-45. Revise the Bulletin Record to show ILF2-45 CANCELLED (CANC).
Page 2 of 2
Operations Manual Bulletin No. ILF2-45(R1), Dated April 1, 2001 (continued)
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 ILF2-45(R1) IN EFFECT (IE).
This Operations Manual Bulletin will be cancelled after Boeing has been notified
all affected airplanes in your fleet have been modified by SB 747-34A2672. If you
do not plan to modify all your airplanes and would like the contents of this bulletin
incorporated in your Operations Manual, please advise Boeing accordingly.
Please send all correspondence regarding Operations Manual Bulletin status to
one of the following addresses:
Mailing Address:Manager, Flight Technical Publications (747-400)
Boeing Commercial Airplane Group
P.O. Box 3707 M/C 20-89
Seattle, WA 98124-2207
USA
Fax: (206) 662-7812
Telex: 32-9430 Station 627
SITA: SEABO7X
CS3 2825 Page 1 of 4
Sect Name Section Name
Operations Manual Bulletin
for
The Boeing Company
Seattle, Washington 98124-2207
International Lease Finance Corp.
Number: ILF2-47(R2)
Date: April 1, 2001
Document Effectivity: D6-30151-425
Subject: FMC ARRIVAL WAYPOINT SEQUENCE ANOMALY
Reason: To inform flight crews of an FMC software anomaly associated with
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.
duplicate route waypoints. Revised to add Service Bulletin information.
Background Information
A software anomaly may cause both FMCs to reset and eventually fail while
adding or modifying the arrival portion of the route. The anomaly may occur when
flight plan arrival modifications duplicate a waypoint in the active route. The
duplicate waypoints may be separated by a route discontinuity or may appear with
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