Flight Crew Operations Manual Bulletin
for
The Boeing Company Seattle, Washington 98124-2207
737
Number: SHZ-18 R1 Date: June 30, 2004 Document Effectivity:
Subject: Look-Ahead Terrain Alerting Display Anomalies
Reason: To inform flight crews of display anomalies associated with GPWS look-ahead terrain alerting. The purpose of this reissue is to provide Service Bulletin information.
Information in this Flight Crew Operations Manual (FCOM) 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
During a GPWS look-ahead terrain CAUTION or WARNING, terrain display data may be positioned inaccurately on the navigation display.
At ranges of 40 NM or greater, solid amber or solid red terrain data displays at an erroneous distance ahead of the airplane symbol. The error increases as the range selection is increased and can be up to 20 NM at the 160 NM range setting. Dotted red, dotted amber, and dotted green terrain data display correctly. Only solid amber (look-ahead terrain CAUTION active) and solid red terrain (look-ahead terrain WARNING active) data displays are affected.
In addition, display of solid amber and solid red terrain data may be delayed by 2 or 3 display sweeps after the initial terrain alert. Once displayed, solid terrain data may be removed on a subsequent display sweep.
Flight Crew Operations Manual Bulletin No. SHZ-18 R1, dated June 30, 2004 (continued)
Operating Instructions
The terrain data display is intended to serve as a situational awareness tool only. It does not provide the accuracy or fidelity on which to solely base terrain avoidance maneuvering decisions.
In the event of a look-ahead terrain CAUTION or WARNING, accomplish the appropriate Terrain Avoidance maneuver in the Non-Normal Maneuvers chapter of the QRH.
Administrative Information
Insert this bulletin behind the FCOM Bulletin Record Page in Volume 1 of your FCOM. Amend the FCOM Bulletin Record Page to show Bulletin SHZ-18 R1 "IN EFFECT" (IE).
This bulletin replaces bulletin SHZ-18, dated May 17, 2000. Discard bulletin SHZ-18. Revise the Bulletin Record to show SHZ-18 as "CANCELLED" (CANC).
This anomaly is corrected by Boeing Service Bulletin 737-34-1616. This FCOM Bulletin will be canceled after Boeing is notified that all affected airplanes in the operator’s fleet have been modified.
Please send all correspondence regarding FCOM bulletin status to one of the
following addresses:
Mailing Address: Manager 737, Flight Technical Integration & Data Boeing Commercial Airplane Group P. O. Box 3707 MS 20-89 Seattle, WA 98124-2207 USA
Fax Number: Telex: SITA: E-MAIL: (206) 662-7812 329430 Station 627 LKEBO7X FTID@Boeing.com
Flight Crew Operations Manual Bulletin
for
The Boeing Company Seattle, Washington 98124-2207 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：737NG机组操作手册Flight Crew Operations Manual FCOM 1(25)
