(2)
Areas not checked by the system test are: outputs and interfaces between computers and systems other than the air data instruments; internal computer functions of static source error correction; the function generator that provides the input to the TAS module (CADC 2 only); and full scale accuracy of outputs from the total air temperature probes.
(3)
Heaters in pitot-static probes and total air temperature probes must remain off during this test. Do-not-operate identifiers must be placed on all probe heater switches. (Refer to 30-31-00, Pitot-Static and Temperature Probe Anti-Icing.)
NOTE: With total air temperature probe heat on, on the ground,
____ TAT and SAT (if installed) indication will not be accurate and flags may appear. This is a normal condition.
EFFECTIVITY
ALL 41.101 Page 508 Oct 25/98
34-12-00
TEST PITOT PRESS. STATIC PRESS. DIFF PRESS. POINT_____ (IN. HG ABS*)_____________ (IAS KNOTS) (IN. HG*)(ALT FEET) (IN. HG*)
1 30.870 140 29.921 0 0.949
2 27.996 250 24.896 5,000 3.100
3 26.122 330 20.577 10,000 5.545
4 19.986 250 16.886 15,000 3.100
5 20.036 350 13.75020,000 6.286
6 15.085 348 8.88530,000 6.200 7 11.575300 7.04135,000 4.534
8 8.638 250 5.53840,0003.100
TEST ALTIMETER
POINT_____ ALTITUDE (FEET)_______________ TOLERANCE** (FEET)__________________ MACH NO.**__________
1 2 1 2 1 2 5
1 -3 -3 |32 |32 0.211 |0.013 0.211 |0.013
2 4,939 4,951 |46 |43 0.409 |0.013 0.410 |0.013
3 9,911 9,922 |53 |51 0.589 |0.008 0.590 |0.008
4 14,925 14,936 |56 |54 0.492 |0.008 0.493 |0.008
5 19,921 19,980 |62 |53 0.750 |0.008 0.753 |0.008
6 3 30,292 30,292 |113 |113 0.916 |0.008 0.916 |0.008
4 30,437 30,394 |174 |157 0.922 |0.008 0.920 |0.008
7 3 35,154 35,191 |128 |128 0.880 |0.008 0.882 |0.008
4 35,154 35,191 |116 |119 0.880 |0.006 0.882 |0.006
8 3 39,969 40,036 |87 |88 0.821 |0.008 0.825 |0.008
4 39,969 40,036 |85 |86 0.821 |0.006 0.825 |0.006
* Optimum pressure values from NASA TN D-822 pressure tables dated August 1961. ** Difference in reading between captain's and first officer's indicators shall not
exceed 1-1/2 times the tolerance for the required reading listed for each test. 1 XA ALL EXCEPT *[2]*[5] 2 AF 117-150,155-171,175-190,197-199; AT 702-799; AZ 212-299; GN 602-699;
IB 408-499; LH 014-050,057-081,083-099; plus apls incorp SB 34-2135.
CADC P/N 60B00058
3
CADC P/N 60B40126/HG480C1/HG480C2
4
5
AZ 281 after incorp SB 34-2208
Scale Error Figure 502
T33464
EFFECTIVITY ALL
799 Page 509
34-12-00
Aug 25/90
(4) Accuracy of test is based on ambient air temperature of 25 (| 5).C and relative humidity of less than 85% in main equipment center and on flight deck. If necessary, use equipment cooling air (21-58-00) and flight deck temperature control (21-61-00) to achieve these conditions.
B. Equipment and Materials
(1)
Two centigrade thermometers with an accuracy of | 0.5.C (Weksler or equivalent)
(2)
Means to heat and cool total air temperature probes
(3)
Stopwatch, Meylar Model No. 228 (or equivalent)
C. Referenced Procedures
(1)
24-22-00, Maintenance Practices (Apply Power)
(2)
34-11-00, Maintenance Practices (Pressurization)
(3)
34-12-00, Adjustment/Test (Operational Test)
D. Test Central Air Data Computer System and Air Data Instruments System
(1)
Perform operational test.
(2)
Verify that:
(a)
Power is on for all air data indicators and both computers.
(b)
Altimeter BARO knobs are adjusted to 29.92 inches of mercury and CADC-STBY switch is in CADC.
(3)
Observe air data instruments and verify warning flags are not visible.
(4)
On front panel of computer part numbers 60B00058 and 60B40126, observe that annunciators are not yellow.
(5)
Sequentially open and close each circuit breaker listed in figure
501.
(6)
As each circuit breaker is opened, observe that captain's and first officer's air data instruments show flags per Fig. 501; after each circuit breaker is closed note that flags are not visible.
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