.
within 10 seconds after passing within two NM of the initial approach fix (approach navigation environment, default RNP = 0.5 NM or with the NPS option, default RNP = 0.3 NM).
In the event of an FMC navigation anomaly, RNAV (RNP) operations should not be conducted while the “VERIFY POSITION” message is displayed. The FMC Source Select Switch should be positioned to BOTH ON L or BOTH ON R to cause the FMC to return to updating from available onside sensors. The FMC Source Select Switch should remain in the selected position for the remainder of the flight to prevent the anomaly from recurring.
Flight Crew Operations Manual Bulletin No. SHZ-33 R2, dated November 01, 2004 (continued)
After landing, a long-term power interrupt of 15 seconds or longer will be necessary to at least one FMC to clear the anomalies. This can be accomplished by removing all airplane electrical power or by an approved maintenance procedure.
This problem remains under investigation. Boeing and Smiths Industries are evaluating the need for an intermediate FMC Update (U10.5a) that would be targeted for second quarter 2004.
Operating Instructions
If the “VERIFY POSITION” message appears, do not clear the message from the FMC scratchpad. Do not conduct RNAV (RNP) operations while the message is displayed.
If the “VERIFY POSITION” message appears shortly after manually entering an approach RNP of 0.2 NM or less while in cruise or during descent above 15,000 feet, slow the airplane to 250 knots or less. If the message is due to delays in sensor updating the message will self-clear.
If the “VERIFY POSITION” message is displayed when descending through 15,000 feet, or after passing within two NM of the initial approach fix, position the FMC Source Select Switch to BOTH ON L or BOTH ON R for the remainder of the flight.
After landing, a long-term power interrupt (15 seconds or longer) must be performed on at least one FMC to clear the anomalies.
Administrative Information
This bulletin replaces bulletin SHZ-33 R1, dated December 15, 2003. Discard bulletin SHZ-33 R1. Revise the Bulletin Record to show SHZ-33 R1 as "CANCELLED" (CANC).
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-33 R2 "IN EFFECT" (IE).
This bulletin will be canceled after Boeing is notified that all affected airplanes in your fleet have been modified by Service Bulletin 737-34A1801. If you do not plan to modify all your airplanes and would like to have the contents of this bulletin incorporated in your FCOM, please advise Boeing accordingly.
Flight Crew Operations Manual Bulletin No. SHZ-33 R2, dated November 01, 2004 (continued)
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: (206) 662-7812
Telex: 329430 Station 627
SITA: LKEBO7X
E-MAIL: FTID@Boeing.com
Flight Crew Operations Manual Bulletin
for
The Boeing Company Seattle, Washington 98124-2207
737
Number: SHZ-36 R1 Date: November 01, 2004 Document Effectivity:
Subject: Autopilot Altitude Acquire/Altitude Capture Anomaly
Reason: This bulletin informs flight crews of an anomaly reported inCollins Enhanced Digital Flight Control System (EDFCS).purpose of this reissue is to provide Service Bulletin information. the The
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. 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(34)
