MANUFACTURER'S RECOMMENDED NOISE ABATEMENT PROCEDURES.

 Note: For Models not quoted, contact the Manufacturer - contact information is available in the HAI Helicopter Annual and available on the HAI web site.

Agusta

• A109A, A109A II and A109C

Bell Helicopter

• 204, 205, 212, UH-1, AH-1 SERIES HELICOPTERS
• 206A, 206B, 206B-3, 206L, 206L-1, 206L-3, 206L-4, and 206LT
• 427, 429
• 407
• 430

Boeing

• 234 and CH-47A
  [Note: Some Information also applies to 107 and CH-46.]

Enstrom
 

• F28F and 280FX

Eurocopter

• EC120, EC130, AS350BA, AS350B2, AS350B3, AS355F1,F2,N,NP
• EC135T1,T2,T2+, EC135P1,P2,P2+, BK117B1,C1,C2, EC145, BO105 all models
• SA 365N (formally Aerospatiale)

MD Helicopters

• MD500N, MD500D, and MD500E (formerly McDonnell Douglas)
• MD530F PLUS (formerly McDonnell Douglas)
• MD 600N (formerly McDonnell Douglas)
• MD 900 (formerly McDonnell Douglas)

Robinson

• R22
• R44

Rogerson Hiller

• UH12 and RH1100

Schweizer

• 300C

Sikorsky

• S-76A/A+/A++/B/C/C+
• S-92

Note: For Models not quoted, contact the Manufacturer - contact information is available in the HAI Helicopter Annual and available on the HAI web site.