190-02246-10 GI 275 Part 23 AML STC Installation Manual
Rev. 11 Page 4-77
4.8 Weight and Balance
The aircraft weight and balance record must be updated after the GI 275 system is installed by following
the procedures typically detailed in Section 8 of the aircraft maintenance manual. Practices defined in
Chapter 10, Section 2, Weighing Procedures, of AC 43.13-1B Aircraft Inspection and Repair are
acceptable.
The aircraft Equipment List must be updated to include items that are added, removed, or relocated. The
updated list must be dated, include the name (and certificate number) of the person that updated the list,
and be retained with aircraft records. A sample calculation is shown in Table 4-12 below.
Table 4-12 Weight and Balance Calculation Example
Aircraft Weight and Balance
Calculated: 11/06/2019
Empty
Weight [lb]
CG [in] Moment [lb-in]
Useful
Load [lb]
2306.70 138.83 320233.96 1093.30
ITEMS REMOVED Weight [lb] Arm [in] Moment [lb-in]
VSI 0.85 116.90 99.37
CDI 1.30 116.60 151.58
Clock and OAT 0.30 117.40 35.22
Sandel HSI 3.60 114.10 410.76
HSI gyro remote 4.90 181.00 886.90
Magnetometer (Old) 0.40 151.00 60.40
Attitude Indicator 2.20 114.50 251.90
Altimeter 1.10 116.10 127.71
Total removed 14.65 2023.84
ITEMS ADDED Weight [lb] Arm [in] Moment [lb-in]
GI 275 ADAHRS (Primary ADI) 2.88 115.80 333.50
GI 275 ADAHRS (HSI/Standby ADI) 2.88 113.10 325.73
GMU 44B, install rack, and universal mount 0.50 146.00 73.00
Total added 6.26 732.23
Change -8.39 -1291.61
Updated Aircraft Weight and Balance
Calculated: 11/06/2019
Empty
Weight [lb] CG [in] Moment [lb-in]
Useful
Load [lb]
2298.31 138.73 318942.35 1084.91
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