Important B737 SB to prevent LOC-I events
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05 Aug 2015 - Important B737 SB to prevent LOC-I events.
The following letter was issued to 737 operators today (5 Aug 2015) by the IATA Safety Team...
Dear B737 operators,
IATA has been approached by the Boeing Company to help communicate the importance of implementing SB 737-34A2292 “NAVIGATION - Enhanced Ground Proximity Warning System - Air Speed Low Alert Changes”.
Implementation in your fleets of this free software upgrade will help reduce the risk of Loss of Control – In Flight events as described by the Service Bulletin:
“This service bulletin gives instructions to replace the Enhanced Ground Proximity Warning System (EGPWS) Computer. The changed EGPWS computer includes new software. The new software installs the Airspeed Low Aural Alert.
If this change is not done, the flight crew will not have an aural alert of a low airspeed condition.
The Primary Flight Display (PFD) will give a visual alert when the speed box turns amber when the airspeed drops 30% or more into the amber band. The new EGPWS computer gives the flight crew the aural alert "AIR SPEED LOW, AIR SPEED LOW" when the speed box turns amber. Accomplishment of this service bulletin will give the flight crew more awareness of a low airspeed condition.”
Please find attached a copy of the Boeing/Honeywell Service Bulletin.
Furthermore, you are kindly requested to advise :
1. Have you already implemented the Bulletin? (Yes/No)
2. If No, are you planning to implement the bulletin ? (Yes/No)
Looking forward to hear from you soon and,
Best regards
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*** Updated 05 Aug 2023 ***
