____NOTE: Actual readouts cannot readily be seen. It is possible, however, to observe readouts slewing.
(2)
Altimeter reverts to standby mode before readout slews 550 feet, then reverts to altitude previously set. IF -
INDICATORS DO NOT SLEW OR FLAGS DO NOT APPEAR - Replace
NOT OK
CADC (34-12-01) and perform specified tests.
ONE INDICATOR DID NOT SLEW OR FLAG DID NOT APPEAR -
NOT OK
Replace faulty indicator (34-13-XX) and perform specified tests. If trouble still exists, replace CADC (34-12-01) and perform specified tests.
OK
EFFECTIVITY
CADC P/N's 60B00058
707 Page 102 AND 60B40126
34-12-00
Aug 25/87 On CADC P/N 60B00058, release SELF-TEST switch, then depress and hold it in again. Check that ALT, M, and TAS warning lights come on within 6 seconds and go off within 120 seconds.
On CADC P/N 60B40126, release button A, then depress and hold it in again. Check that ALT warning light comes on within 6 seconds and goes off within 130 seconds.
NOT OK
OK
NOT OK
NOT OK
TAT INDICATION INCORRECT - Replace TAT indicator
NOT OK
(34-13-07) and perform specified tests. If error still exists, replace total air temperature probe (34-12-02) and perform specified tests.
____No. 2 temperature probe for flight engineer's
NOTE: TAT indicator and No. 1 temperature probe for pilots' TAT indicator.
OK
EFFECTIVITY
CADC P/N's 60B00058
707 Page 103 AND 60B40126
34-12-00
Aug 25/87
NOT OK NOT OK NOT OK
NOT OK
NOT OK
OK TAS ERROR REPORTED - Replace TAS indicator (34-13-02) and perform specified test. If error still exists, check out applicable portions of system (34-12-0, System Test).
SAT ERROR REPORTED - Replace SAT indicator (34-13-03) and perform specified test. If error still exists, check out applicable portions of system (34-12-0, System Test).
TAT ERROR REPORTED - Replace TAT indicator (34-13-07) and perform specified test. If error still exists, replace total air temperature probe (34-12-02) and perform specified test.
NOTE:____ No. 2 temperature probe for flight engineer's TAT
indicator and No. 1 temperature probe for pilots'
TAT indicator (if installed).
SYSTEM IS OPERABLE.
EFFECTIVITY
CADC P/N's 60B00058
707 Page 104 AND 60B40126
34-12-00
Aug 25/87 Prepare system for trouble shooting as described in par. 2. Place TEST SELECT switch on CADC to SLF-TST. Place STBY-CADC switch on altimeters to CADC position. Depress and hold PUSH TO TEST switch on CADC and check response.
(1)
TEST VALID WHEN LIT light on CADC will come on and stay on.
(2)
Warning flags will appear and readouts will slew on mach, altitude, TAS (CADC No. 1 only), and SAT (CADC No. 2 only) indicators. Indicator readouts shall stop slewing after a maximum of 130 seconds.
NOTE:____ Actual readouts cannot readily be seen. It is possible, however, to observe readouts slewing.
(3)
Altimeter reverts to standby mode before readout slews 550 feet, then reverts to altitude previously set. IF -
NOT OK
NOT OK
NOT OK
OK ONE INDICATOR DID NOT SLEW OR FLAG DID NOT APPEAR -Replace faulty indicator (34-13-XX) and perform speci-fied tests. If trouble still exists, replace CADC (34-12-01) and perform specified tests.
Release PUSH TO TEST switch. Ensure while indicators are slewing to their original values, TEST VALID WHEN LIT light goes out. Ensure when indicators stop slewing: 1) warning flags are out of view, 2) indicators are at original values and 3) altimeter remains in standby mode. IF -
NOT OK NOT OK OK
EFFECTIVITY CADC P/N HG480C1
707 Page 105
34-12-00
Aug 25/87
NOT OK
OK TAT INDICATION INCORRECT - Replace TAT indicator (34-13-07) and perform specified test. If error still exists, replace total air temperature probe (34-12-02) and perform specified test.
NOTE: No. 2 temperature probe for flight engineer's TAT indicator.
CADC and associated air data pressure instruments self-test properly. Review pilots' flight report to determine if instrument error is reported, if so, proceed to appropriate NOT OK block. If report indicates problem is due to interface to other systems, perform complete check of CADC system (34-12-00, System Test).
EFFECTIVITY CADC P/N HG480C1
757 Page 106
34-12-00
Aug 25/87EFFECTIVITYCADC P/N HG480C1
757 Page 107
34-12-00 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：747飞机维护手册AMM CHAPTER 34 - NAVIGATION 第34章导航1(62)
