Smiths Aerospace
Electronic Systems – Malvern
DOC NO.0134ED
MAINTENANCE MANUAL SUPPLEMENT
BOEING B737-100/200/300/400/500
28-41-04
(c) Verify that the calculated fuel quantity (using fuel measuring sticks) for each tank is within
+/- 400 lbs of the fuel quantity shown on the fuel quantity indicator.
(d) If within these limits and the TSU was not changed since the last system calibration, then
system checks OK. If TSU was changed since last calibration, perform system empty
calibration only per 4.A (skip step 4.A.5), and 4.B (skip steps 4.B.6, 4.B.8, 4.B.10, 4.B.12,
4.B.14, 4.B.25 and 4.B.26); do not change parameters P04, P05, P10 and P11.
(e) For tanks not meeting (c), perform complete system test and calibration per paragraphs 3
and 4.
3. System Test - Fuel Quantity Indicating System
A. Special Tools and Equipment
(1) System test unit – Model 8000, Barfield Instrument Corp., Miami, Florida 33142
(2) Test harness - F72731-118
NOTE:
You must control the quality of the test cables. Make sure stray capacitance for the
test cables is less than 0.2 pf
(3) TSU jumper harness:
(a) Part number 201475-001 (Smiths Aerospace, Inc.)
B. References
(1) AMM 24-22-00/201, Manual Control
(2) AMM 27-81-00/201, Leading Edge Flaps and Slats
(3) AMM 28-23-00/201, Defueling
(4) AMM 28-41-81/401, Fuel Summation Unit
C. Access
(1) Location Zones
101
Control Cabin, Left
217
Right Main Wheel Well
303
Left Wing Inboard Leading Edge
402
Right Wing Outboard Leading Edge
403
Right Wing Inboard Leading Edge
(2) Access Panels
6540
Refueling Station Access Door
CONFIG
4.3
Page 503
Dec 18/02
Airplanes with Smiths 2307 Model Fuel Quantity Indicators
with TSU
(BARFIELD SYSTEM TESTER)
EFFECTIVITY
