Source: https://www.federalregister.gov/articles/2008/01/28/E8-1392/special-conditions-embraer-sa-model-emb-500-airspeed-indicating-system-231323e
Timestamp: 2016-06-01 01:46:45
Document Index: 592226929

Matched Legal Cases: ['art 23', 'art 23', '§ 21', '§ 11', '§ 11', '§ 21', 'art 23', 'art 34', 'art 23', 'art 36', '§ 611', 'art 23', 'art 25', '§ 21', 'art 23']

Federal Register | Special Conditions: Embraer S.A., Model EMB-500, Airspeed Indicating System 23.1323(e)
Special Conditions: Embraer S.A., Model EMB-500, Airspeed Indicating System 23.1323(e)
Publication Date: Monday, January 28, 2008
Dates: Comments must be received on or before February 27, 2008.
Comments Close: 02/27/2008
73 FR 4763
-4764 (2 pages)
Docket No. CE286
Notice No. 23-08-03-SC
Document Number: E8-1392
Shorter URL: https://federalregister.gov/a/E8-1392 Related Topics
This action proposes special conditions for the Embraer Model EMB-500 airplane. This airplane will have a novel or unusual design feature(s) associated with airspeed system. The applicable airworthiness regulations do not contain adequate or appropriate safety standards for this design feature. These proposed special conditions contain the additional safety standards that the Administrator considers necessary to establish a level of safety equivalent to that established by the existing airworthiness standards.
Comments must be received on or before February 27, 2008.
Mail two copies of your comments to: Federal Aviation Administration, Regional Counsel, ACE-7, 901 Locust, Room 506, Kansas City, Missouri 64106. You may deliver two copies to the Small Airplane Directorate at the above address. Mark your comments: Docket No. CE286. You may inspect comments in the Rules Docket weekdays, except Federal holidays, between 7:30 a.m. and 4 p.m.
J. Lowell Foster, Small Airplane Directorate Standards Office, ACE-111, Federal Aviation Administration, Small Airplane Directorate, Aircraft Certification Service, 901 Locust, Kansas City, MO 64106; telephone (816) 329-4125; facsimile (816) 329-4090.
If you want the FAA to acknowledge receipt of your comments on this proposal, include with your comments a pre-addressed, stamped postcard on which the docket number CE286 appears. We will stamp the date on the postcard and mail it back to you.
On October 5, 2005, Embraer applied for a type certificate for their new Model EMB-500. The EMB-500 is predominantly a metal low-wing airplane with a “T” tail vertical and horizontal stabilizer. The Model EMB-500 provides accommodations for two pilots and up to four passengers in the main cabin area. It is powered by two Pratt and Whitney Canada PWC 617F/1 turbofan engines with approximately 1600 pounds of thrust each. The engines are mounted on the aft fuselage pylons. Two redundant FADECs will control each engine. The maximum takeoff weight is 9965 pounds. The V MO/M MO speeds for the model EMB-500 are 275 KIAS/M0.70; and the maximum altitude is 41,000 feet.
Under the provisions of 14 CFR 21.17, Embraer must show that the EMB-500 meets the applicable provisions of part 23, effective February 1, 1965, as amended by amendments 23-1 through 23-55. If the Administrator finds that the applicable airworthiness regulations (i.e., 14 CFR, part 23) do not contain adequate or appropriate safety standards for the Embraer Model 500 series because of a novel or unusual design feature, special conditions are prescribed under the provisions of § 21.16.
Special conditions, as appropriate, as defined in § 11.19, are issued in accordance with § 11.38, and become part of the type certification basis in accordance with § 21.17(a)(2).
In addition to the applicable airworthiness regulations and special conditions, the EMB-500 must comply with the part 23 fuel vent and exhaust emission requirements of 14 CFR part 34 and the part 23 noise certification requirements of 14 CFR part 36 and the FAA must issue a finding of regulatory adequacy under § 611 of 92, the “Noise Control Act of 1972.”.
The Embraer Model 500 will incorporate the following novel or unusual design features: aft-mounted turbojet engines, certain performance and flight characteristics, and operating limitations necessary for this type of airplane.
The proposed special conditions for the EMB-500 came from the 14 CFR part 23 commuter category. Section 23.1323(e) requires that the airspeed indicating system must be calibrated to determine the system error during the accelerate-takeoff ground run. The ground run calibration must be obtained between 0.8 of the minimum value of V 1 and 1.2 times the maximum value of V 1, considering the approved ranges of altitude and weight. The ground run calibration must be determined assuming an engine failure at the minimum value of V 1.
Regarding the proposed SC 23.1323(e), Embraer understands that airspeed indicating system calibration in ground-effect should be performed up to the maximum V 2 value, considering the approved range of altitude and weight. As V 1 values are very close to V 2 values on normal takeoffs, calibration up to 1.2 V 1 requires the calibration in ground-effect for speeds higher than V 2, when the airplane is already flying and out of ground-effect. Therefore, Embraer proposes that SC 23.1323(e) be changed to read like part 25, as follows:
“In addition, the airspeed indicating system must be calibrated to determine the system error during the accelerate-takeoff ground run. The ground run calibration must be obtained between 0.8 of the minimum value of V 1 and the maximum value of V 2, considering the approved ranges of altitude and weight. The ground run calibration must be determined assuming an engine failure at the minimum value of V 1.”
As discussed above, these special conditions are applicable to the Embraer Model 500 series. Should Embraer apply at a later date for a change to the type certificate to include another model incorporating the same novel or unusual design feature, the special conditions would apply to that model as well under the provisions of § 21.101(a)(1).
This action affects only certain novel or unusual design features on the Embraer Model 500 series of airplanes. It is not a rule of general applicability, and it affects only the applicant who applied to the FAA for approval of these features on the airplane.
The FAA agrees with Embraer's position and proposed revision of the special conditions for section 23.1323(e).
List of Subjects in 14 CFR Part 23 Back to Top
49 U.S.C. 106(g), 40113, and 44701; 14 CFR 21.16 and 21.17; and 14 CFR 11.38 and 11.19.
The Proposed Special Conditions Back to Top
Accordingly, the Federal Aviation Administration (FAA) proposes the following special conditions as part of the type certification basis for Embraer Model EMB-500 series airplanes:
SC 23.1323(e)
In addition, the airspeed indicating system must be calibrated to determine the system error during the accelerate-takeoff ground run. The ground run calibration must be obtained between 0.8 of the minimum value of V 1 and the maximum value of V 2, considering the approved ranges of altitude and weight. The ground run calibration must be determined assuming an engine failure at the minimum value of V 1.
Issued in Kansas City, Missouri on January 15, 2008.
[FR Doc. E8-1392 Filed 1-25-08; 8:45 am]