STC SH2750NM

SH2750NM Air Comm Corporation 14903 Grant Street, Suite 110 Thornton, CO 80023 Part 27 Title 14, Code of Federal Regulations H2SW Bell Textron Canada Limited See Continuation Sheet Page 3 of 4 Pages

1. FAA Approved ACC Rotorcraft Flight Manual Supplement for Bell Helicopter Models 206A and 206B with 250-C20, C20B, C20J engines, dated May 12, 1986 or later FAA approved revision is required.

(See Continuation Sheet Page 3 of 4 Pages) 05/05/1985 06/16/1987 11/24/2014 05/12/1986 07/07/1988 09/18/1988 04/19/1993 ✔ for Manager, West Certification Branch 4 Installation of a Freon type Cabin Air Conditioning System with an engine driven compressor in accordance with Air Comm Corporation Master Installation Drawing List – Bell 206 Air Conditioning System, Document No. DL-206AC-MIDL, Revision BB, dated April 28, 2026, or (See Continuation Sheet Page 3 of 4 Pages)

SH2750NM 10/15/2026 4

SH2750NM 10/15/2026 Date Amended (continued):

February 15, 1994; June 4, 1997; May 19, 2003; March 25, 2011; October 15, 2026

Model (continued):

206A, 206B, 206L, 206L-1, 206L-3, 206L-4

Description of Type Design Change (continued):

later Federal Aviation Administration (FAA) approved revision. Maintained in accordance with Instructions for Continued Airworthiness (ICA), 206EC-260M, Revision J, dated August 24, 2026, or later FAA accepted revision for the 206L, L1, L3 Air Conditioning Systems, and 206EC-270M, Revision M, dated August 24, 2026, or later FAA accepted revision for the 206L4 Air Conditioning Systems.

2. FAA Approved ACC Rotorcraft Flight Manual Supplement 206AC-202 for Bell Helicopter Models 206L, 206L-1 and 206L-3 with 250-C20B, C28B, or C30P engines and the model 206L with the 250-C20R/2 engine, in accordance with STC SH4169NM, dated July 5, 1988 or later FAA approved revision is required.

3. FAA Approved ACC Rotorcraft Flight Manual Supplement 206AC-204 for Bell Helicopter Model 206L-4 with 250-C30P engine, dated March 19, 1993 or later FAA approved revision is required.

4. FAA Approved ACC Rotorcraft Flight Manual Supplement for Bell Helicopter Models 206L-4 modified in accordance with STC SR00036SE (Twin Engine), dated February 15 1994, or later FAA approved revision is required.

5. FAA Approved Rotorcraft Flight Manual Supplement No. 206AC-203, dated May 19, 2003, or later FAA Approved revision is required for Bell Helicopter models 206A and 205B with air conditioning system installed in accordance with Air Comm Drawing No. 206EC-203.

SH2750NM 10/15/2026 Limitations and Conditions (continued):

6. This STC also applies to Bell Model 206L-4 Helicopters with Twin Engines installed in accordance with STC SR00036SE.

7. Model 206L-1 helicopters equipped with an ACC 206 air conditioner and modified per Bell Engine Upgrade Service Instructions BHT-206-SI-2050 must use the 206L-3 performance data in ACC Rotorcraft Flight Manual Supplement 206AC-202, rev 4 or later FAA Approved revision.

8. Model 206L-1 helicopters equipped with an ACC 206 air conditioner and modified per Bell Engine Upgrade Service instructions BHT-206-SI-2050, and Bell Gross Weight Upgrade Service Instructions BHT-206-SI-2052, must use the 206L-4 performance data in the ACC Rotorcraft Flight Manual Supplement 206AC-204, Rev.1 or later FAA approved revision.

9. Model 206L-3 equipped with an ACC 206 air conditioner helicopter modified per Bell Gross weight Upgrade Service Instructions BHT-206-SI-2052, must use the 206L-4 performance data in the ACC Rotorcraft Flight Manual Supplement 206AC-204, Rev. 1 or later approved revision.

10. Approval of this change in type design applies only to the models of Rotorcraft listed above and on the continuation sheet(s).

11. The installer must determine whether this design change is compatible with previously approved modifications.

12. If the holder agrees to permit another person to use this certificate to alter a product, the holder must give the other person written evidence of that permission.

13. A copy of this certificate and the appropriate flight manual supplement as listed above must be maintained as part of the permanent record for the altered aircraft.

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