Source: https://www.federalregister.gov/documents/2013/06/12/2013-13800/special-conditions-eurocopter-france-ec175b-use-of-30-minute-power-rating
Timestamp: 2017-10-20 03:20:13
Document Index: 260499538

Matched Legal Cases: ['§\u200929', '§\u200929', '§\u200929', '§\u200929', '§\u200929', 'art 36', '§\u200911', '§\u200911', '§\u200921', '§\u200929', '§\u200929', '§\u200929']

Federal Register :: Special Conditions: Eurocopter France, EC175B; Use of 30-Minute Power Rating
A Rule by the Federal Aviation Administration on 06/12/2013
78 FR 35108
FAA-2013-0502
https://www.federalregister.gov/d/2013-13800 https://www.federalregister.gov/d/2013-13800
Send comments identified by docket number FAA-2013-0502 using any of the following methods:
Eurocopter France proposes that the EC175B model use a novel and unusual design feature, which is a 30-minute power rating, identified in the Pratt & Whitney Canada PT6C-67E engine type certificate data sheet (TCDS) [FAA TCDS No. E00068EN]. 14 CFR 1.1 defines “rated takeoff power” as limited in use to no more than 5 minutes for takeoff operation. Thus, the use of takeoff power for 30 minutes will require special airworthiness standards, known as special conditions, to address the use of this 30-minute power rating and its effects on the rotorcraft. The use of this power will be limited to 50 minutes per flight based on engine durability considerations. These special conditions will add requirements to the existing airworthiness standards in 14 CFR 29.1049 (Hovering cooling test procedures), § 29.1305 (Powerplant instruments), and § 29.1521 (Powerplant limitations).
For the EC175B, the European Aviation Safety Agency has issued CRI E-01, which documents the special conditions.Start Printed Page 35109
In addition to the requirements of § 29.1049, the aircraft cooling effects due to use of the 30-minute power rating must be accounted for in the testing.
In addition to the requirements of § 29.1305, since this new 30-minute power rating has a time limit associated with its use, the pilot must have the means to identify:
In addition to the requirements of § 29.1521, Powerplant Limitations, the use of takeoff power for 30 minutes must be limited to not more than 30 minutes per use and no more than 50 minutes per flight. This is based upon the definition of “rated takeoff power” in 14 CFR 1.1, which limits the use of rated takeoff power to periods of not over 5 minutes for takeoff operation.
In addition to the applicable airworthiness regulations and special conditions, the EC175B must comply with the noise certification requirements of 14 CFR part 36; and the FAA must issue a finding of regulatory adequacy under section 611 of Public Law 92-574, the “Noise Control Act of 1972.”
The FAA issues special conditions, as defined in § 11.19, in accordance with § 11.38, and they become part of the type certification basis under § 21.17(a)(2).
Accordingly, pursuant to the authority delegated to me by the Administrator, the following special conditions are issued as part of the type certification basis for Eurocopter France model EC175B helicopter. Unless stated otherwise, all requirements in §§ 29.1049, 29.1305, and 29.1521 remain unchanged.
“The hovering cooling provisions at the 30-minute power rating must be shown—
the continuous time limit of the 30-minute power rating if the highest temperature recorded is not stabilized before.”
(b) Section 29.1305 Powerplant instruments, at Amendment 29-40. In addition to the requirements of this section, the special condition is similar to § 29.1305(a)(25) for the 30-minute power rating and states:
“For rotorcraft with a 30-minute power rating, a means must be provided to alert the pilot when the engine is at the 30-minute power level, when the event begins, when the time interval expires, and when the cumulative time in one flight is reached.”
(c) Section 29.1521 Powerplant limitations, at Amendment 29-41. In addition to the requirements of this section, the special condition is similar to § 29.1521(b) and states:
“Use of the 30-minute power must be limited to no more than 30 minutes per use, and no more than 50 minutes per flight. The use of the 30-minute power must also be limited by:
(6) If the time limit established in paragraph (b)(6) of this paragraph exceeds 2 minutes—
(i) The maximum allowable engine and transmission oil temperatures.”
[FR Doc. 2013-13800 Filed 6-11-13; 8:45 am]