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5) Remove the vinyl adhesive tape from S2 port on lower LH probe. Check that reading on first officer's altitude indicator drops to field altitude.
CAUTION: MAKE SURE THAT YOU REMOVE ALL OF THE PIECES OF
_______ TAPE FROM EACH PITOT-STATIC PROBE. THE SYSTEM WILL NOT OPERATE CORRECTLY WHEN THE TAPE IS IN ITS POSITION.
(d) Auxiliary Static No. 1 Cross-Manifolding Check
1) Seal S1 port on lower RH probe and S2 port on upper LH probe with vinyl adhesive tape.
WARNING: WHEN THE STATIC PORTS ARE COVERED, MAKE SURE THAT
_______ CONDITION IS VISIBLE FROM THE GROUND. FAILURE TO OBSERVE AND REMOVE COVERINGS OVER STATIC PORTS BEFORE FLIGHT MAY CAUSE LARGE ERRORS IN AIRSPEED-SENSING AND ALTITUDE-SENSING SIGNALS, WHICH MAY LEAD TO LOSS OF SAFE FLIGHT.
CAUTION:_______DO NOT EXTEND THE SEALS INTO THE STATIC PORTS. YOU CAN CAUSE DAMAGE TO THE SURFACE IN THE AREA WHEN YOU REMOVE THE SEALS.
2) Apply vacuum equivalent to approximately 100 feet above field barometric altitude to auxiliary No. 1 static drain fitting, located at LH forward side of STA 400 bulkhead forward of main equipment center.
3) While observing vacuum gage on test set, remove the seal from S1 port on lower RH probe. Check that the reading on vacuum gage drops to field altitude.
4) Reseal S1 port on lower RH probe with vinyl adhesive tape and repeat step 2).
WARNING: WHEN THE STATIC PORTS ARE COVERED, MAKE SURE THAT
_______ CONDITION IS VISIBLE FROM THE GROUND. FAILURE TO OBSERVE AND REMOVE COVERINGS OVER STATIC PORTS BEFORE FLIGHT MAY CAUSE LARGE ERRORS IN AIRSPEED-SENSING AND ALTITUDE-SENSING SIGNALS, WHICH MAY LEAD TO LOSS OF SAFE FLIGHT.
CAUTION: DO NOT EXTEND THE SEALS INTO THE STATIC PORTS.
_______ YOU CAN CAUSE DAMAGE TO THE SURFACE IN THE AREA WHEN YOU REMOVE THE SEALS.
5) While observing vacuum gage on test set, remove seal from S2 on upper LH probe. Check that reading on vacuum gage drops to field altitude.
(e) Auxiliary Static No. 2 Cross-Manifolding Check
EFFECTIVITY
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1) Seal S1 port on lower LH probe and S2 port on upper RH probe with vinyl adhesive tape.
WARNING: WHEN THE STATIC PORTS ARE COVERED, MAKE SURE THAT
_______ CONDITION IS VISIBLE FROM THE GROUND. FAILURE TO OBSERVE AND REMOVE COVERINGS OVER STATIC PORTS BEFORE FLIGHT MAY CAUSE LARGE ERRORS IN AIRSPEED-SENSING AND ALTITUDE-SENSING SIGNALS, WHICH MAY LEAD TO LOSS OF SAFE FLIGHT.
CAUTION: DO NOT EXTEND THE SEALS INTO THE STATIC PORTS.
_______ YOU CAN CAUSE DAMAGE TO THE SURFACE IN THE AREA WHEN YOU REMOVE THE SEALS.
2) Apply vacuum equivalent to approximately 100 feet above field barometric altitude to auxiliary No. 2 static system drain fitting, located at LH forward side of STA 400 bulkhead forward of main equipment center.
3) While observing vacuum gage on test set, remove seal from S1 port on lower LH probe. Check that reading on vacuum gage drops to field altitude.
4) Reseal S1 port on lower LH probe with vinyl adhesive tape and repeat step 2).
WARNING: WHEN THE STATIC PORTS ARE COVERED, MAKE SURE THAT
_______ CONDITION IS VISIBLE FROM THE GROUND. FAILURE TO OBSERVE AND REMOVE COVERINGS OVER STATIC PORTS BEFORE FLIGHT MAY CAUSE LARGE ERRORS IN AIRSPEED-SENSING AND ALTITUDE-SENSING SIGNALS, WHICH MAY LEAD TO LOSS OF SAFE FLIGHT.
CAUTION: DO NOT EXTEND THE SEALS INTO THE STATIC PORTS.
_______ YOU CAN CAUSE DAMAGE TO THE SURFACE IN THE AREA WHEN YOU REMOVE THE SEALS.
5) While observing vacuum gage on test set, remove seal from S2 on upper RH probe. Check that reading on vacuum gage drops to field altitude.
F. Restore Airplane to Normal
EFFECTIVITY
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(1) Remove all the vinyl adhesive tape and adapters from all pitot-static probes. Check that no deposits or roughness exists in or about static ports or pitot head apertures.
WARNING:_______ FAILURE TO REMOVE VINYL ADHESIVE TAPE FROM STATIC PORTS BEFORE FLIGHT MAY CAUSE LARGE ERRORS IN AIRSPEED-SENSING AND ALTITUDE-SENSING SIGNALS, WHICH MAY LEAD TO LOSS OF SAFE FLIGHT.
CAUTION:_______ MAKE SURE THAT YOU REMOVE ALL OF THE PIECES OF TAPE FROM EACH PITOT-STATIC PROBE. THE SYSTEM WILL NOT OPERATE CORRECTLY WHEN THE TAPE IS IN ITS POSITION.
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本文链接地址：747飞机维护手册AMM CHAPTER 34 - NAVIGATION 第34章导航1(47)
