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D6-27370-866-EGP B-33 Page 1 of 2
CoversFile HighlightIncorrect FMC Speed/Altitude Constraints following a runway change with a Standard Terminal Arrival (STAR) and the previous runway already executed in the FMCEGP-33
Flight Crew Operations Manual Bulletin
for
Egyptair
Number: EGP-33
IssueDate: July 1, 2016
Airplane Effectivity: 737-600/700/800/900 and BBJ Airplanes with U10.2
through U12 FMC Operational Software.
Subject: Incorrect FMC Speed/Altitude Constraints following a runway change
with a Standard Terminal Arrival (STAR) and the previous runway
already executed in the FMC
Reason: To inform crews on this subject and to provide guidance.
THE FOLLOWING PROCEDURE AND/OR INFORMATION IS EFFECTIVE UPON RECEIPT
Background Information
An operator reported that during an arrival with a valid STAR and runway active
in the FMC flight plan, the landing runway was changed by Air Traffic Control
(ATC). After the runway change was made in the FMC, the crew noticed that the
waypoint constraints associated with the new RWY selection were incorrect. The
FMC software did not automatically update the speed and altitude constraints
associated with the new RWY selection in the FMC, with a valid STAR/RWY
combination active in the FMC flight plan. The speed/altitude constraints
associated with the initial STAR and previous runway assignment remained in
the active flight plan.
This results with incorrect waypoint constraints in the FMC flight plan for the
STAR with the selection of a new RWY.
This condition was introduced in U10.2 and is present in all versions of FMC
software from U10.2 through U12.
The Boeing Company
Seattle, Washington 98124-2207
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.
September 15, 2016
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