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

• AS350, AS365, and AS332.(formally Aerospatiale)
• AS 355F, F1, F2
• EC135P1P2P2+ and EC135T1T2T2
• EC 120B
• EC 130 B4
• SA 365N (formally Aerospatiale)
• BK 117 and B0105 (formally MBB)

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.