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D6-27370-866-EGP B-18 Page 3 of 4
Flight Crew Operations Manual Bulletin No. EGP-18 R1, Dated June 8, 2009 (continued)
A new AFM Non-Normal Procedure, LANDING CONFIGURATION, will be
created to direct crews to assure correct landing configuration if the steady horn
sounds in flight.
The current WARNING HORN – CABIN ALTITUDE OR CONFIGURATION
QRH non-normal checklist will be revised in a future revision of the FCOM
QRH to include the changes defined in the AMOC. In addition, a new checklist,
titled LANDING CONFIGURATION will be added. The QRH checklists may
not be an exact replica of the AFM procedures, but will be written for
consistency with the Boeing format.
AD 2008-23-07
The Cabin Altitude Warning Takeoff Briefing in Section 3 of the AFM will be
revised to clarify that immediate donning of oxygen masks and accomplishment
of the subsequent memory item steps from the WARNING HORN OR
WARNING LIGHT – CABIN ALTITUDE OR TAKEOFF CONFIGURATION
non-normal checklist are only required if the intermittent warning horn sounds in
flight at an aircraft flight altitude above 10,000 feet MSL.
The Takeoff briefing in the Before Start Procedure in the Normal Procedures
section of the FCOM will be updated in a future revision to reflect this change.
Operating Instructions
To further reduce the risk of flight crew incapacitation due to hypoxia following
loss of cabin pressurization, cabin altitude warning indications and memory item
procedures must be briefed on airplanes in which the CABIN ALTITUDE and
TAKEOFF CONFIG lights are not installed, or are installed but not activated.
This briefing will be included as an additional item on the Takeoff briefing
before engine start for the first flight of the day or following any change of either
flight crew member.
The briefing must include the following:
• Whenever the intermittent warning horn sounds in flight at an airplane
flight altitude above 10,000 feet MSL:
1. Immediately, don oxygen masks and set regulators to 100%.
2. Establish crew communications.
3. Do the CABIN ALTITUDE WARNING or Rapid Depressurization non-
normal checklist.
• Both pilots must verify on the overhead Cabin Altitude Panel that the
cabinaltitude is stabilized at or below 10,000 feet before removing oxygen
masks.
Operators may want to seek an Alternative Method of Compliance (AMOC) to
develop a new crew briefing or to utilize current approved briefings to meet the
compliance of this AD.
September 24, 2015
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