flyzhz
22nd Jun 2013, 08:18
Can anybody tell me how to know the flap position if the flap indicator freeze?
It happens on the SIM,during a normal approach affter trailing edge flap disagree,the flap lever is 5 and the needles point to 1 .
Then I follow the QRH "Trailing Edge Flap Disagree" Plan to extend flaps to 15 using alte rnate flap extension.When the needles point to 5,the Landing Gear Configuration Warnings begin.
At first I think the flap indicator freeze,but I can use the Landing Gear Configuration Warnings to find out the actual flap position.Because the alttitude is baove 800RA,so the flap is not 0 to 10;then if I push and pull the thrust lever to see whather the sound stop,if it stop ,the flap should between 15 dan 25,if not, the flap should be more than 25.
As my FCOM says:
Aural Indications
A steady warning horn is provided to alert the flight crew wh enever a landing is
attempted and any gear is not down and locked. The landing gear warning horn is
activated by forward thrust lever and flap position as follows:
Flaps up through 10 –
• altitude below 800 feet RA, when either forward thrust lever set between
idle and approximately 20 degrees thrust lever angle or an engine not
operating and the other thrust lever less than 34 degrees. The landing gear
warning horn can be s ilenced (reset) with th e landing gear warning
HORN CUTOUT switch
• if the airplane descends below 200 feet RA, the warning horn cannot be
silenced by the warning HORN CUTOUT switch.
Flaps 15 through 25 –
• either forward thrust lever set below approximately 20 degrees or an
engine not running, and the other thrust lever less than 34 degrees; the
landing gear warning horn cannot be silenced with the landing gear
warning HORN CUTOUT switch.
Flaps greater than 25 –
• regardless of forward thrust lever position; the landing gear warning horn
cannot be silenced with the landing gear warning HORN CUTOUT
switch.
The warning indication is cancelled when the configuration error is corrected.
But then I am hesitent that is the warming activated by trailing edge flap position or the flap lever position?
B737 Ryanair Cockpit Companion says:the horn is activated by trailing edge flap and thrust lever position.
if normal AC power is lost, indicator will freeze,no asymmetry protection-
making a selection with the flap lever sends a measured voltage to the gauge -if you select 1 and the gauge gose to 5, you've had a loitage spike and probably a tripped CB.
Maby the warning systerm is wrong?I don't know.
It happens on the SIM,during a normal approach affter trailing edge flap disagree,the flap lever is 5 and the needles point to 1 .
Then I follow the QRH "Trailing Edge Flap Disagree" Plan to extend flaps to 15 using alte rnate flap extension.When the needles point to 5,the Landing Gear Configuration Warnings begin.
At first I think the flap indicator freeze,but I can use the Landing Gear Configuration Warnings to find out the actual flap position.Because the alttitude is baove 800RA,so the flap is not 0 to 10;then if I push and pull the thrust lever to see whather the sound stop,if it stop ,the flap should between 15 dan 25,if not, the flap should be more than 25.
As my FCOM says:
Aural Indications
A steady warning horn is provided to alert the flight crew wh enever a landing is
attempted and any gear is not down and locked. The landing gear warning horn is
activated by forward thrust lever and flap position as follows:
Flaps up through 10 –
• altitude below 800 feet RA, when either forward thrust lever set between
idle and approximately 20 degrees thrust lever angle or an engine not
operating and the other thrust lever less than 34 degrees. The landing gear
warning horn can be s ilenced (reset) with th e landing gear warning
HORN CUTOUT switch
• if the airplane descends below 200 feet RA, the warning horn cannot be
silenced by the warning HORN CUTOUT switch.
Flaps 15 through 25 –
• either forward thrust lever set below approximately 20 degrees or an
engine not running, and the other thrust lever less than 34 degrees; the
landing gear warning horn cannot be silenced with the landing gear
warning HORN CUTOUT switch.
Flaps greater than 25 –
• regardless of forward thrust lever position; the landing gear warning horn
cannot be silenced with the landing gear warning HORN CUTOUT
switch.
The warning indication is cancelled when the configuration error is corrected.
But then I am hesitent that is the warming activated by trailing edge flap position or the flap lever position?
B737 Ryanair Cockpit Companion says:the horn is activated by trailing edge flap and thrust lever position.
if normal AC power is lost, indicator will freeze,no asymmetry protection-
making a selection with the flap lever sends a measured voltage to the gauge -if you select 1 and the gauge gose to 5, you've had a loitage spike and probably a tripped CB.
Maby the warning systerm is wrong?I don't know.