"Air Comm strives ceaselessly to design and produce products that
provide optimal comfort, safety, reliability and value for our customers." - Keith Steiner

Service Bulletins

May be mandatory or at the discretion of the operator. Service bulletins contain information regarding upgrades and improvements.

AgustaWestland AW109 Heater
AgustaWestland AW119 Air Conditioning
  • SB A119-604_RevNC
    Replacement of Forward Evaporator Assembly A119-6002, with the new S-6118EC-1
  • SB A119-620_RevNC
    Inspection of the Aft Evaporator mounting brackets, and the addition of spacers between the Evaporator Assembly and the Upper Deck area
  • SB A119-622_RevNC
    Aft Evaporator Drain Improvements
  • SB A119-3010_RevNC
    Removal and Replacement of A119 Air Conditioner Compressor Temperature Sensor
  • SB A119-3024 REV E
    Installation of A119 Air Conditioner Oil Cooler Inlet Screen Assembly, Engine Governor Control Cable Guard and Compressor Drive Belt
  • SB A119-7002_RevNC
    Removal and Replacement of A119 Air Conditioner Condenser Scoop Bellcrank / Up-grade
  • SB A119-8422_RevNC
    Removal and Replacement of A119 Air Conditioner Timer Logic Modification
  • SB A119-682-1 REV NC
    SB A119-682-1; A119 Air Conditioner Cabin Air Conditioner Outlet Assembly Change
  • SB A119-111014_RevA
    Agusta A119 Air Conditioner Aft Evaporator Blower Motor Connector
  • SB A119-7004_RevA
    Agusta A119 Air Conditioner Condenser Blower Motor Connector
  • SB A119-3502 Rev A
    Agusta A119 Engine Governor Control Cable Guard
  • SB A119-3054 Rev B
    Agusta A119 Air Conditioner Compressor Belt Guard Improvements
  • SB A119-208_RevNC
    Air conditioner performance up-grades and improvements
  • SB A119-302_RevNC
    Supplemental inspection requirements for the A119 Compressor Mount
  • SB A119-303-REV A
    Supplemental one-time inspection and modification requirements for the A119 Compressor Mount Installation
  • SB A119-306-REV D
    Removal and Replacement of A119 Air Conditioner Compressor Drive Belt Design Change
  • SB A119-502_RevNC
    Replacement of Binary Switch ES57010-1 with ES57178-1
Air Conditioning
Airbus AS350 Air Conditioning
Airbus EC120 Air Conditioning
Airbus EC130 Air Conditioning
Airbus EC135 Air Conditioning
Airbus EC145 Air Conditioning
Bell 206 (Keith Products/Meggitt Addison) Air Conditioning
Bell 206 Air Conditioning
Bell 222 Air Conditioning
Bell 407 Air Conditioning
Bell 412 Air Conditioning
Bell 427 Air Conditioning
Bell 429 Air Conditioning
  • SB 429-204_Rev_N/C
    Bell 429 Conversion of the 429EC-200-3, -5, or -6 Dual Evaporator System equipped with Allied motors to the 429EC-202-3, or -4 Single Evaporator System equipped with Allied motors
  • SB_429-622_Rev_F
    Improved drain system for the Bell 429 Helicopter Air Conditioning System Aft Evaporator installations 429EC-622-1 & -2 and 429EC-624-1.
  • SB_429-202-1_Rev_A
    Conversion of the 429EC-200-1 Dual Evaporator System equipped with Fasco motors to the 429EC-202-1 Single Evaporator System equipped with Allied motors.
  • SB_429-203-1_Rev_A
    Conversion of the Bell 429EC Air Conditioner Electrical Provisions to accommodate the Allied Blower Motors.
  • SB 429-200-5_Rev_N/C
    Conversion of 429EC-202-1/-3 Single Evaporator System to 429EC-200-5 Dual Evaporator System.
  • SB 429-201-1 Rev NC
    Service Bulletin for condenser fan motor
Bell 429 Heating System
  • SB 429-928_Rev_NC
    Bell Helicopter Model 429 Windshield Defroster Product Improvement
Cessna 206H & T206H Air Conditioning
Cessna 402B, 402C Air Conditioning
Cessna 404 Air Conditioning
Cessna 414 / 421 Air Conditioning
  • SB124-1A_RevB
    Conversion to R134a 402B, 414, 414A, 421B, & 421C (York Compressor)
  • SB124-1_RevD
    Conversion to R134a 402B, 414, 414A, 421B, & 421C
Learjet 31, 31A, 35, 35A, (C-21A), 36, 36A Air Conditioning
  • SB174_RevNC
    Belt Guard Replacement Installation Assembly Modification
Learjet 55 Air Conditioning
  • SB155_RevA
    Maintenance Access panel Installation
  • SB174_RevNC
    Belt Guard Replacement Installation Assembly Modification