# AC 93-2: Noise Levels for Aircraft used for Commercial Operations in Grand Canyon National Park Special Flight Rules Area

- Type: Advisory circular (guidance, not mandatory unless a rule or AD requires it)
- Status: Current
- Approved: June 13, 2006
- Last reviewed: January 29, 2009
- Family: AC 93-2
- 14 CFR parts: 93
- Pages: 19
- PDF: https://openairdocs.org/files/sha256/a7/68/a7680847434170f9a7477ae89e2987ff4cd86441986c062c45689363e977851a
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/822A9B4EB9279F058625752700715321.0001
- DRS record last changed: January 29, 2009
- Page: https://openairdocs.org/ac/93-2

## Versions

- [AC 93-2](https://openairdocs.org/ac/93-2) (Current), approved Jun 13, 2006, 19 pages

## Text

Each page's text from the PDF; open the PDF at a page with #page=N.

### Page 1

U.S. Department of Transportation Advisory Circular Federal Aviation Administration Subject:

**NOISE LEVELS FOR AIRCRAFT USED**

**FOR COMMERCIAL OPERATIONS IN**

**GRAND CANYON NATIONAL PARK**

SPECIAL FLIGHT RULES AREA Date: 6/13/2006 Initiated by: AEE-100 AC No: AC-93-2 Change:

1. Purpose. This circular contains the measured or estimated noise levels for aircraft currently used for commercial sightseeing operations in the Grand Canyon National Park (GCNP) special flight rules area, ranked in alphabetical order for the conditions and assumptions described below. This information is provided both for aircraft that have been noise type certificated under 14 CFR part 36, and for aircraft for which no such requirements existed at the time of type certification. The noise level data presented in the appendices are provided for determining the GCNP quiet aircraft technology designation status for each aircraft subject to 14 CFR part 93.

2. Cancellation.

3. Background. On March 29, 2005, the Federal Aviation Administration (FAA) published a Final Rule entitled “Noise Limitations for Aircraft Operations in the Vicinity of Grand Canyon National Park”. This amendment of 14 CFR part 93 is necessary to establish reasonably achievable requirements for aircraft operating in the GCNP to be considered as employing quiet aircraft technology. The standards for the GCNP quiet aircraft technology proposed in the rule will be used to assist the National Park Service (NPS) achieve its statutory mandate to provide for the substantial restoration of natural quiet and to enhance visitor’ experience in the GCNP.

4. Aircraft Noise Limits for GCNP Quiet Aircraft Technology. Noise levels of propeller-driven small airplanes and helicopters that operate at GCNP at the time of preparation of this circular are presented in Appendices 1 and 2. The data were obtained by the methodology described in Section 5 of this circular. The sources of the data as they relate to Section 5 of this circular are designated in the “NOTES” column. The GCNP quiet aircraft technology status of each aircraft is provided in the “QUIET TECHNOLOGY” column.

Appendix 1 provides noise levels of propeller driven small airplanes that are subject to Appendix F or G of 14 CFR part 36. Appendix 1 includes maximum takeoff weights, landing weights, engine type, horsepower, propeller type and diameter.

### Page 2

AC-93-2 6/13/2006 Appendix 2 contains noise levels of helicopters that are subject to Appendix H or J of 14 CFR part 36. This appendix includes maximum takeoff weights, landing weights, engine type, rotor type and diameter.

Aircraft are listed in alphabetical order by make and model in Appendices 1 and 2. The noise levels in the appendices were obtained during the noise certification process as prescribed under 14 CFR part

36. Where no certificated noise level is available, the Administrator may approve an alternative measurement or estimation procedure.

Part 93 classifies aircraft used in commercial sightseeing flight operations over GCNP by the noise they produce. Part 93 establishes the GCNP quiet aircraft technology designation status for propellerdriven small airplanes and helicopters. The status of each aircraft was determined according to its noise nuisance at a common noise sensitive reference point in GCNP. The aircraft noise limits, based on aircraft certification noise levels are shown in Figure 1 through 4 for GCNP quiet aircraft technology.

The noise limits are expressed for propeller-driven small airplanes and helicopters as follows:

(a) For helicopters with a flyover noise level obtained in accordance with the measurement procedures prescribed in Appendix H of part 36, the limit is 80 dB for helicopters having 2 or fewer passenger seats, increasing at 3 decibels per doubling of the number of passenger seats for helicopters having 3 or more passenger seats. The limit for helicopters having 3 or more seats can be calculated using the formula:

EPNL(H) = 80 +10log(# PAX seats/2) dB

(b) For helicopters with a flyover noise level obtained in accordance with the measurement procedures prescribed in Appendix J of part 36, the limit is 77 dB for helicopters having 2 or fewer passenger seats, increasing at 3 decibels per doubling of the number of passenger seats for helicopters having 3 or more passenger seats. The limit for helicopters having 3 or more seats can be calculated using the formula:

SEL(J) = 77 +10log(# PAX seats/2) dB

(c) For propeller-driven airplanes with a measured flyover noise level obtained in accordance with the measurement procedures prescribed in Appendix F of part 36 without the performance correction defined in Sec. F35.201(c), the limit is 69 dB for airplanes having 2 or fewer passenger seats, increasing at 3 decibels per doubling of the number of passenger seats for airplanes having 3 or more passenger seats. The noise limit for propeller-driven airplanes having 3 or more seats can be calculated using the formula:

LAmax(F) = 69 +10log(# PAX seats/2) dB

(d) In the event that a flyover noise level is not available in accordance with Appendix F of 14 CFR part 36, the noise limit for propeller-driven airplanes with a takeoff noise level obtained in accordance with the measurement procedures prescribed in Appendix G is 74 dB or 77 dB depending on 14 CFR part 36 amendment level, for airplanes having two or fewer passenger seats, increasing at 3 dB per doubling of the number of passenger seats for airplanes having three or more passenger seats.

The noise limit for propeller driven airplanes having 3 or more seats can be calculated using the formula:

### Page 3

6/13/06 AC-93-2 LAmax(G) = 74 +10log(# PAX seats/2) dB for aircraft certificated to 14 CFR part 36 Amendment 21 or earlier;

LAmax(G) = 77+10log(# PAX seats/2) dB for aircraft certificated to 14 CFR part 36 Amendment 22 or later.

5. Methodology to Categorize Noise Efficiency. The GCNP noise incentive plan is based on certificated noise levels determined under 14 CFR part 36. These levels may be found in FAA AC 36- 1H or in the aircraft flight manual. Some aircraft, depending on the date of type certification, were not subject to the noise certification provisions of 14 CFR part 36, and do not have noise certification levels. For those aircraft, either measured noise levels from tests that are not approved by the FAA as certification quality (e.g., research test data) or estimates by approved methods were used. All estimated noise certification levels provided in this circular are for the sole and specific purpose of determining compliance with GCNP noise efficiency criteria and may not be used to establish compliance under any regulation.

The following hierarchy of noise level data sources was used in establishing noise levels for aircraft listed in Appendices 1 and 2. The same hierarchy will be used for future additions to the appendices.

1. U.S. type certifications using 14 CFR part 36 with noise certification levels obtained from FAA-approved flight manuals or FAA AC 36-1.

a) For propeller driven small airplanes the hierarchy of regulations is:

1) 14 CFR part 36 Appendix F

2) 14 CFR part 36 Appendix G

b) For helicopters the hierarchy of regulations is:

3) 14 CFR part 36 Appendix J

4) 14 CFR part 36 Appendix H

2. Foreign type certifications using ICAO Annex 16, Volume I with noise certification levels obtained from approved flight manuals, data approved by the foreign civil aviation authority, or FAA AC 36-1.

a) For propeller driven small airplanes the applicable hierarchy of regulations is:

1) ICAO Annex 16, Volume I Chapter 6

2) ICAO Annex 16, Volume I Chapter 10

b) For helicopters the hierarchy of regulations is:

3) ICAO Annex 16, Volume I Chapter 11

4) ICAO Annex 16, Volume I Chapter 8

3. Research or other measurement test data obtained under controlled conditions, documented and corrected to the certification conditions of part 36 Appendix F for small propeller driven airplanes and part 36 Appendix J for helicopters. Preference would be placed on those data obtained under certification-like conditions or those data collected under an FAA-sponsored noise research test.

4. FAA approved noise estimation methods that seek to estimate part 36 Appendix F noise levels for small propeller driven airplanes or part 36 Appendix J noise levels for helicopters.

Currently the following methods may be suitable for use, but are subject to FAA approval on a case-by-case basis.

### Page 4

AC-93-2 6/13/2006

a) For propeller driven small airplanes: Method in Section 2.2 of DOT/FAA/AEE-82- 11

b) For helicopters: SAE/AIR 1989 2

5. FAA approved noise level estimation method using FAA's Integrated Noise Model (INM) or an FAA-approved equivalent.

As one moves down in the hierarchy, the expected level of substantiation (as the representative noise certification level-estimated) by the operator or owner increases, and the level of FAA scrutiny will increase.

The resulting noise levels will vary depending upon the availability of FAA-approved data and its rank in the hierarchy. In the case of helicopters, the noise levels must be the flyover noise certification level and expressed in the noise metric of Effective Perceived Noise Level (14 CFR part 36, Appendix H) or Sound Exposure Level (14 CFR part 36, Appendix J). In the case of small propeller-driven airplanes the noise levels must be the flyover (14 CFR part 36, Appendix F) or takeoff (14 CFR part 36, Appendix G) noise certification level and expressed in the noise metric of maximum A-weighted sound level.

6. Distribution.

7. Revisions.

Carl E. Burleson Director of Environment and Energy

1 DOT/FAA/AEE-82-1: “A Description of Methodologies Used in Estimation of A-Weighted Sound Levels for FAA Advisory Circular AC-36-3B”, published by AEE in January 1982 2 SAE/AIR 1989: “Helicopter External Noise Estimation “, published by Society of Automotive Engineering in December 1992.

### Page 5

6/13/06 AC-93-2

**LIST OF FIGURES**

### Page 6

AC-93-2 6/13/2006 Figure 1 GCNP Aircaft Noise Limits for Quiet Technology Helicopters Measured Under Appendix H 75 80 85 90 95 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Number of Pasenger Seats Effective Perceived Noise Level (EPNdB) EPNL(H) = 80 +10log(# PAX seats/2) dB

### Page 7

6/13/06 AC-93-2 Figure 2 GCNP Aircaft Noise Limits for Quiet Technology Helicopters Measured Under Appendix J 75 80 85 90 95 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Number of Pasenger Seats Sound Exposure Level (dB) SEL(J) = 77 +10log(# PAX seats/2) dB

### Page 8

AC-93-2 6/13/2006 Figure 3 GCNP Aircaft Noise Limits for Quiet Technology Propeller-Driven Small Airplanes Measured Under Appendix F 65 70 75 80 85 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Number of Pasenger Seats A-Weighted Sound Pressure Level (dBA) Lamax(F) = 69 +10log(# PAX seats/2) dB

### Page 9

6/13/06 AC-93-2 Figure 4 GCNP Aircaft Noise Limits for Quiet Technology Propeller-Driven Small Airplanes Measured Under Appendix G 70 75 80 85 90 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Number of Pasenger Seats A-Weighted Sound Pressure Level (dBA) Lamax(G) = 74 +10log(# PAX seats/2) dB for certifications obtained under 14 CFR part 36 Amendment 21 or earlier Lamax(G) = 77 +10log(# PAX seats/2) dB for certifications obtained under 14 CFR part 36 Amendment 22 or later

### Page 10

AC-93-2 6/13/2006

**APPENDICES**

### Page 11

**APPENDIX I**

**GCNP INCENTIVE PLAN NOISE LEVELS**

PROPELLER-DRIVEN SMALL AIRPLANES Updated 12/22/2008 NOISE LEVEL MAKE MODEL MTOW MLW # OF ENGINES MAKE MODEL ENG.

**PWR RPM**

EXHAUST # OF PROP BLADES MAKE MODEL PROP DIA RPM PITCH APP. F (dBA) APP. G (dBA) # OF PAX NOTES BEECH 36, A36

3.6

**3.6 1 TCM I0-520-B(A) 285 2700 5 3**

**MCCAULEY 3A32C76 80 2700 V**

**78.8 5 F NO BEECH 36, A36**

3.6

**3.6 1 TCM I0-520-BB 275 2550 5 2**

**MCCAULEY 2A36C23 84 2550 V**

**78.0 5 F NO BEECH 36, A36**

3.65

**3.7 1 TCM IO-550-B 300 2700 5 3**

**MCCAULEY 3A32C406 80 2700 V**

**78.2 5 F NO BEECH 65A90**

9.3

8.8 2 P&W PT6A-20 500 2200 9 3

**HARTZELL HC-B3TN-2B/M 93 2200 V**

**78.7 8 F NO BEECH 76**

3.9

**3.9 2 LYC O-360-A1G6D 165 2700 2 2**

**HARTZELL HC-M2YR-2CEUF 76 2700 V**

**80.2 5 F NO BEECH 76**

3.98

**3.98 2 LYC O-360-A1G6D 165 2700 5 2**

**HARTZELL HC-M2YR-2CLUF 76 2700 V**

**79.5 5 F NO BEECH C99**

11.3

11.3 2 P&W PT6A-36 715 2200 9 3

**HARTZELL HC-B3TN-3B/M 93 2200 V**

**79.3 15 F NO BEECH V35**

3.4

**3.4 1 TCM I0-520-BA 285 2700 5 3**

**MCCAULEY 3A32C406 78 2700 V**

**78.1 4 F NO CESSNA 172M**

2.3

**2.3 1 LYC 0-320-E2D 150 2700 6 2**

**MCCAULEY 1C160/CTM/DTM 75 2700 F**

**74.3 3 F NO CESSNA 172P**

2.4

**2.4 1 LYC 0-320-D2J 150 2700 6 2**

**MCCAULEY 1C160/DTM 75 2700 F**

74.3 3 F NO

**QUIET TECHNOLOGY**

### Page 12

**APPENDIX I**

**GCNP INCENTIVE PLAN NOISE LEVELS**

PROPELLER-DRIVEN SMALL AIRPLANES Updated 12/22/2008 NOISE LEVEL MAKE MODEL MTOW MLW # OF ENGINES MAKE MODEL ENG.

**PWR RPM**

EXHAUST # OF PROP BLADES MAKE MODEL PROP DIA RPM PITCH APP. F (dBA) APP. G (dBA) # OF PAX NOTES

QUIET TECHNOLOGY CESSNA 182*

2.55

**2.55 1 TCM 0-470-L 230 2600 5 2**

**HARTZELL HC-82XF-1 82 2600 V**

72.0 3 F NO CESSNA 182H*

2.8

**2.8 1 TCM 0-470-R 230 2600 5 2**

**MCCAULEY 2A34C66 82 2600 V**

**72.0 3 F NO CESSNA 182P**

2.95

**2.95 1 LYC 0-470-R/S 230 2600 5 2**

**MCCAULEY 2A34C-201/66 82 2600 V**

**72.0 3 F NO CESSNA 182R 3.1 1 TCM 0-470-V 230 2600 5 2**

**MCCAULEY C2A34C204 82 2400 V**

**72.0 3 F NO CESSNA 182Q**

2.95

**2.95 1 LYC 0-470-U 230 2400 5 2**

**MCCAULEY C2A34C204 82 2400 V**

72.0 3 F NO CESSNA 206*

3.3

**3.3 1 TCM IO-520-A 285 2700 5 2**

**MCCAULEY D2A34C58 82 2700 V**

78.5 5 F NO CESSNA 207*

3.8

**3.8 1 TCM IO-520-F 285 2700 5 3**

**MCCAULEY D3A32C90 80 2700 V**

77.8 6 F NO CESSNA 207A*

3.8

**3.8 1 TCM IO-520-F 285 2700 5 3**

**MCCAULEY D3A34C404 80 2700 V**

79.0 6 F NO CESSNA 208 (AMPHIB)*

7.6

**7.3 1 P&W PT6A-114 600 9 3HARTZELL HC-B3MN-3 100 1900 V**

72.8 9 F YES CESSNA 208 (LAND)* 8

**7.8 1 P&W PT6A-114 600 9 3HARTZELL HC-B3MN-3 100 1900 V**

**72.8 9 F YES**

### Page 13

**APPENDIX I**

**GCNP INCENTIVE PLAN NOISE LEVELS**

PROPELLER-DRIVEN SMALL AIRPLANES Updated 12/22/2008 NOISE LEVEL MAKE MODEL MTOW MLW # OF ENGINES MAKE MODEL ENG.

**PWR RPM**

EXHAUST # OF PROP BLADES MAKE MODEL PROP DIA RPM PITCH APP. F (dBA) APP. G (dBA) # OF PAX NOTES

QUIET TECHNOLOGY CESSNA 208B*

8.75

8.5 1 PRATT+WHITNEY PT6A-114 600 8 3HARTZELLL HC-B3MN-3 100 1900 V

72.8 13 F YES CESSNA 402 / 402B*

6.3

**6.2 2 TCM TSIO-520-E/B 300 2700 4 3**

**MCCAULEY 3AF32C504**

76.5 2700 V

81.6 8 F NO CESSNA 402A*

6.3

**6.2 2 TCM TSIO-520E 300 2700 4 3**

**MCCAULEY 3AF32C87NR**

76.5 2700 V

81.6 8 F NO CESSNA 402C*

6.85

**6.9 2 TCM TSIO-520-UB 325 2700 4 3**

**MCCAULEY 3AF32C92N 76 2700 V**

80.8 9 F NO CESSNA 402C*

6.85

**6.9 2 TCM TSIO-520-VB 310 2600 4 3**

**MCCAULEY 3AF32C93 77 2600 V**

**77.2 9 F NO CESSNA 421C**

7.2

**7.45 2 TCM GTSIO-520-L/N 375 2235 4 3**

**MCCAULEY 3FF32C501 90 2235 V**

**80.3 9 F NO CESSNA 425**

8.2

**8.0 2 P&W PT6A-112 500 9 3HARTZELL HC-B3TN-3D 102 2110 V**

75.7 19 F YES CESSNA CE-182R*

**3.10 1TCM O-470-V 230 2400 8 2**

**MCCAULEY D2A34C203 82 2400 V**

72.0 3 F NO CESSNA CE-182-R182*

3.10

**3.10 1 TCM O-540-J3C5D 235 2400 8 2**

**MCCAULEY B3D34C214 82 2400 V**

72.7 3 F NO CESSNA CE-402-B*

6.85

**6.85 2 TCM TSIO-520-E 150 2700 3 3**

**MCCAULEY 3AF32C87M 76 2700 V**

81.6 9 F NO

### Page 14

**APPENDIX I**

**GCNP INCENTIVE PLAN NOISE LEVELS**

PROPELLER-DRIVEN SMALL AIRPLANES Updated 12/22/2008 NOISE LEVEL MAKE MODEL MTOW MLW # OF ENGINES MAKE MODEL ENG.

**PWR RPM**

EXHAUST # OF PROP BLADES MAKE MODEL PROP DIA RPM PITCH APP. F (dBA) APP. G (dBA) # OF PAX NOTES

QUIET TECHNOLOGY CESSNA T207*

3.8

**3.8 1 TCM TSIO-520-G 285 2600 4 3**

**MCCAULEY D3A32C90 80 2600 V**

77.9 6 F NO CESSNA T207A*

3.8

**3.8 1 TCM TSIO-520-G-1A 285 2600 4 3**

**MCCAULEY 3A32C401 80 2600 V**

**77.9 6 F NO CESSNA T210L**

3.8

**3.8 1 TCM IO-520-L 285 2700 5 3**

**MCCAULEY D3A34C402-C 80 2700 V**

80.2 5 F NO CESSNA T210M*

3.8

**3.8 1 TCM IO-520-L 285 2700 5 3**

**MCCAULEY D3A32C88 80 2700 V**

**77.4 5 F NO CESSNA T210N**

3.8

**3.8 1 TCM IO-520-L 285 2700 5 3**

**MCCAULEY D3A34C404 80 2700 V**

**77.4 5 F NO CESSNA TR182**

3.1

**3.1 1 LYC O-540-L3C5D 235 2400 5 2**

**MCCAULEY B2D34C217 82 2400 V**

**73.8 3 F NO CESSNA TR182**

3.1

**3.1 1 LYC O-540-L3C5D 235 2400 5 3**

**MCCAULEY B3D32C407 79 2400 V**

70.6 3 F YES CESSNA TU206C / TU206F*

3.6

**3.6 1 TCM TSIO-520-C 285 2700 4 3**

**MCCAULEY D2A34C78 82 2700 V**

78.5 5 F NO CESSNA TU206G*

3.6

**3.6 1 TCM TSIO-520-M 285 2600 4 3**

**MCCAULEY D3A34C402 80 2600 V**

78.5 5 F NO CESSNA TU206G (AMPHIB)*

3.6

**3.6 1 TCM TSIO-520-M 285 2600 4 3**

**MCCAULEY D3A34C402 80 2600 V**

78.0 5 F NO

### Page 15

**APPENDIX I**

**GCNP INCENTIVE PLAN NOISE LEVELS**

PROPELLER-DRIVEN SMALL AIRPLANES Updated 12/22/2008 NOISE LEVEL MAKE MODEL MTOW MLW # OF ENGINES MAKE MODEL ENG.

**PWR RPM**

EXHAUST # OF PROP BLADES MAKE MODEL PROP DIA RPM PITCH APP. F (dBA) APP. G (dBA) # OF PAX NOTES

QUIET TECHNOLOGY CESSNA U206B/D/F*

3.6

**3.6 1 TCM IO-520-F 285 2700 5 3**

**MCCAULEY D2A34C58 82 2700 V**

77.9 5 F NO CESSNA U206B/D/F/G*

3.6

**3.6 1 TCM IO-520-F 285 2700 5 3**

**HARTZELL HC-C3YF-IRF 78 2700 V**

77.9 5 F NO

DE HAVILLAND DHC-6-300*

12.5

**12.3 2 P&W PT6A-27 680 9 3HARTZELL HC-B3TN-3D 102 2110 V**

**77.2 19 6 YES**

DORNIER DO-228-202*

**13.15 2ALLIED SIGNAL TPE-331-5-252D 455 3810 1 4**

**HARTZELL HC-B4TN-5ML 107 V**

78.3 4 6 NO

DORNIER DO-228-202*

**13.15 2ALLIED SIGNAL TPE-331-5-252D 455 3810 1 4**

**HARTZELL HC-B4TN-5ML 107 V**

**78.3 19 6 YES FOKKER F27**

45.0

42.0 2

ROLLS ROYCE DART 532-7R 2307 8 2?DOWTY ROTOL R193-4-30-4 138 V

**85.0 42 I YES**

**PARTENAVIA 68CTC**

4.38

**4.38 2 LYC TIO/T0-360-C1A6D 210 2575 4 2**

**HARTZELL HC-C2YK-2CUF 76 2575 V**

**75.4 6 F NO PIPER PA-18-150**

17.5

**17.5 1 LYC O-320-A2B 150 2700 7 2**

**SENSENICH M74DM6-0-56 74 2700 F**

**69.0 3 F YES PIPER 28-R200**

2.65

**2.65 2 TCM TSI0-360-E/EB 200 2700 5 2**

**HARTZELL HC-C2YK-1( )/F 74 2700 V**

**75.5 3 F NO PIPER 32-300**

3.4

**3.4 1 LYC I0-540-K1A/G5 300 2700 5 2**

**HARTZELL HC-C2YK-1( )/F 80 2700 V**

80.5 6 F NO

### Page 16

**APPENDIX I**

**GCNP INCENTIVE PLAN NOISE LEVELS**

PROPELLER-DRIVEN SMALL AIRPLANES Updated 12/22/2008 NOISE LEVEL MAKE MODEL MTOW MLW # OF ENGINES MAKE MODEL ENG.

**PWR RPM**

EXHAUST # OF PROP BLADES MAKE MODEL PROP DIA RPM PITCH APP. F (dBA) APP. G (dBA) # OF PAX NOTES

**QUIET TECHNOLOGY PIPER 32RT-300T**

3.6

**3.6 1 LYC TI0-540-S1AD 270 2575 4 2**

**HARTZELL HCE2YR-1( )/F 80 2575 V**

**75.7 6 F NO PIPER PA-31-350**

**7.01 7 2 LYC TIO-540-J2BD 315 2400 4 3**

**HARTZELL HC-E3YR-2ATF 80 2400 V**

**78.0 9 F NO PIPER PA-31-T3**

**9.0 2PWC PT6A-11 455 3810 1 3**

**HARTZELL HC-B3TN-3B/T 93 V**

**76.6 3 F NO PIPER PA-34-200T**

4.57

**4.34 2 TCM TSI0-360-E/EB 200 2575 4 2**

**HARTZELL BHC-C2YF-2( )F/UF 76 2575 V**

**75.7 5 F NO PIPER PA-34-200T**

4.57

**4.34 1 LYC I0-360-C1C/6 200 2575 5 3**

**MCCAULEY 3AF34C502/3 76 2575 V**

**78.6 5 F NO PIPER PA-42-720**

11.2

10.23 2 PRATT+WHITNEY PT6A-41 720 8 3HARTZELLL HC-B3TN-3B/T10173AB-6Q 95 2000 V

80.3 8 F NO

EXHAUST CONFIGURATIONS (RECIPROCATING ENGINES)STUB PIPES 1 = SMALL COLLECTOR, SHORT EXHAUST PIPE 2 = BAFFLES IN COLLECTOR AND/OR CONES IN EXHAUST PIPE 3 = TURBOCHARGER 4 = HEAT MUFF 5 = COLLECTOR WRAPAROUND MANIFOLD STRAIGHT PIPE 6 = MANIFOLD MUFFLER 7 = RESONATOR MUFFLER 8 = TURBINE * currently flying at GCNP

### Page 17

**APPENDIX I**

**GCNP INCENTIVE PLAN NOISE LEVELS**

PROPELLER-DRIVEN SMALL AIRPLANES Updated 12/22/2008 NOISE LEVEL MAKE MODEL MTOW MLW # OF ENGINES MAKE MODEL ENG.

**PWR RPM**

EXHAUST # OF PROP BLADES MAKE MODEL PROP DIA RPM PITCH APP. F (dBA) APP. G (dBA) # OF PAX NOTES

**QUIET TECHNOLOGY**

NOTES COLUMN INDICATE THE HIERARCHY USED IN OBTAINING THE NOISE LEVEL FOR THE EXPLANATION OF THE HIERARCHY SEE SECTION 6.

F = 14 CFR part 36 Appendix F measured noise levels G = 14 CFR part 36 Appendix G certificated noise level 6 = ICAO Annex 16, Volume I Chapter 6 measured noise levels 10 = ICAO Annex 16, Volume I Chapter 10 certificated noise level R = Research or other measurement test data E = FAA approved noise estimation method defined by fourth hierarcy in Section 5 I = FAA approved noise estimation using the Integrated Noise Model FOR DEFINITION OF CATEGORIES SEE SECTION 4 AND FIGURE 1.

NOMENCLATURE # Number APP. F (dBA) Measured/Estimated APP. F level in dBA by the method described in column labeled NOTES APP. G (dBA) Measured/Estimated APP. G level in dBA by the method described in column labeled NOTES ENG, POWER, RPM Engine power in HP, operational RPM MAKE, MODEL Manufacturer and model designation MTOW, MLW Maximum Takeoff Weight, Maximum Landing Weight PAX Passenger seats PROP DIAM, RPM, PITCH Propeller diameter in inches, operational RPM AND PITCH (V: Variable, F: Fix)

### Page 18

**APPENDIX II**

**GCNP INCENTIVE PLAN NOISE LEVELS**

HELICOPTERS Updated 12/22/2008 NOISE LEVEL

HELICOPTER MAKE MODEL MGW MLW # OF ENGINES

**MAKE MODEL**

MAIN ROTOR #OF BLADES MAKE MODEL MAIN ROTOR DIA.

TAIL ROTOR #OF BLADES MAKE MODEL

TAIL ROTOR DIA APP. H (EPNdB) APP. J (SEL) # OF PAX NOTES

AEROSPATIALE AS-350-B ASTAR 4.63 1Turbomeca Arriel 1B 3 AEROSPATIALE/EUROCOPTER 35' 2AERO/EURO 6'10" 86.8 6 H NO

AEROSPATIALE AS-350-BA* 4.63 1Turbomeca Arriel 1B 3 AEROSPATIALE/EUROCOPTER 35' 2AERO/EURO 6'10" 86.8 6 H NO

AEROSPATIALE AS-350-B2 Ecureuil * 4.96 1Turbomeca Arriel 1D1 3 AEROSPATIALE/EUROCOPTER 35' 2AERO/EURO 6'10" 87.1 6 H NO

AEROSPATIALE AS-350-B2 Ecureuil * 4.96 1Honeywell LTS101-700D-2 3 AEROSPATIALE/EUROCOPTER 35' 2AERO/EURO 6'10" 85.4 6 NO

AEROSPATIALE AS-350-B3 Ecureuil 4.96 1 Turbomeca Arriel 2B 3 AEROSPATIALE/EUROCOPTER 35' 2AERO/EURO 6'10" 87.3 6 H/8 NO

AEROSPATIALE AS-350-B3 Ecureuil 5.071 1 Turbomeca Arriel 2B 3 AEROSPATIALE/EUROCOPTER 35' 2AERO/EURO 6'10" 84.7 6 J/11 NO BELL Jet Ranger BHT-206-B/BII* 3.2 1Allison 250-C20 2BHT-206 33' 4" 2BHT-206 5' 5" 84.6 4 8 NO BELL - Long Ranger BHT-206-L/ L1* 4.05 1Allison 250-C28B 2BHT-206 37' 2BHT-206 5' 6" 85.8 6 8 NO BELL - Long Ranger III BHT-206-L3* 4.15 1Allison 250-C30P 2BHT-206 37' 2BHT-206 5' 6" 87.8 6 8 NO BELL - Long Ranger IV BHT-206-L4* 4.45 1Allison 250-C30P 2BHT-206 37' 2BHT-206 5' 6" 85.2 6 H NO BELL - Long Ranger BHT-206-L4* 4.55 1Allison 250-C20R 2BHT-206 37' 2BHT-206 5' 6" 85.2 6 J NO BELL BHT-407* 5 1Allison 250-C47 4BHT-407 35' 2BHT-407 5' 5" 85.1 6 J NO BELL BHT-407 with Quiet Cruise Kit* 5 1Allison 250-C47 4BHT-407 35' 2BHT-407 5' 5" 81.3 6 J YES

**QUIET TECHNOLOGY**

### Page 19

**APPENDIX II**

**GCNP INCENTIVE PLAN NOISE LEVELS**

HELICOPTERS Updated 12/22/2008

EUROCOPTER EC-130-B4* 5.291 1Turbomeca Arriel 2 B 1 3 EUROCOPTER 35' 10EUROCOPTER 3'3" 84 7 H/8 YES

EUROCOPTER EC-130-B4* 5.351 1Turbomeca Arriel 2 B 1 3 EUROCOPTER 35' 10EUROCOPTER 3'3" 84 7 H/8 YES MDHI MD-900 Explorer* 6.25 1 PW206A 1C 5 MDHI 33.83' NOTAR System - 83 8 H YES MDHI MD-900 Explorer* 6.25 1 PW207E 5 MDHI 33.83' NOTAR System - 83 8 H YES Whisper Jet S-55QT (Sikorsky S-55 modified)* 7.7 1 Allied Signal TSE 331-10-591 SW 5 S-55 53' 2S-55 8' 9" 80 9 H YES FOR THE EXPLANATION OF THE HIERARCHY SEE SECTION 6.

H = 14 CFR part 36 Appendix H J = 14 CFR part 36 Appendix J 8 = ICAO Annex 16, Volume I Chapter 8 11 = ICAO Annex 16, Volume I Chapter 11 R = Research or other measurement test data E = FAA approved noise estimation method as defined in the fourth hieraracy in Section 5 I = FAA approved noise estimation using the Integrated Noise Model FOR DEFINITION OF CATEGORIES SEE SECTION 4 AND FIGURE 1-4.

NOMENCLATURE # Number APP. H NOISE LEVEL Measured/Estimated App. H level in EPNdB by method described in column labeled NOTES APP. J NOISE LEVEL Measured/Estimated App. J level in SEL by method described in column labeled NOTES DIA Diameter in feet MAKE, MODEL Manufacturer and model designation MTOW, MLW (1000 LBS) Maximum Takeoff Weight, Maximum Landing Weight PAX Passenger seats * Currently flying at GCNP

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