In the context of engine certification, how are 'sudden encounter' and 'suddenly commencing' defined under CS-E 790 regarding rain and hail ingestion?

For interpreting 'sudden encounter' in CS-E 790(a)(2) and 'suddenly commencing' in CS-E 790(b), refer to paragraphs (5)(c)(iv)(D) and (G) in AMC E 790(a)(2).

What is the interpretation of 'rapid acceleration' and 'rapid deceleration' according to AMC E 790(b)(2) and (b)(4) concerning engine response?

'Rapid acceleration' and 'rapid deceleration' in CS-E 790(b)(2) and (b)(4) should be interpreted as a throttle movement occurring in no more than one second.

AMC E 790 Rain and Hail Ingestion

Q: What constitutes 'unacceptable mechanical damage' and 'unacceptable power or thrust loss' according to AMC E 790 regarding rain and hail ingestion in engines?

For interpreting 'unacceptable mechanical damage' and 'unacceptable power or thrust loss' in CS-E 790(a)(1), (a)(2), (b) and (c), refer to paragraphs (5)(c)(vi), (5)(c)(vi)(A) and (B) in AMC E 790(a)(2).

Q: How should 'flameout, rundown, continued or non-recoverable surge or stall' be interpreted in the context of CS-E 790(a)(2) and (b) for engine certification?

To interpret 'flameout, rundown, continued or non-recoverable surge or stall' in CS-E 790(a)(2) and (b), see paragraphs (1) and (5)(c)(vi) in AMC E 790(a)(2).

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AMC E 790 Rain and Hail Ingestion

ED Decision 2007/015/R

(1) For the purposes of interpreting the words ‘unacceptable mechanical damage’ and ‘unacceptable power or thrust loss' in CS-E 790(a)(1), (a)(2), (b) and (c), see paragraphs (5)(c)(vi), (5)(c)(vi)(A) and (B) in AMC E 790(a)(2).

(2) For the purposes of interpreting the words ‘flameout, rundown, continued or non-recoverable surge or stall’ in CS-E 790(a)(2) and (b), see paragraphs (1) and (5)(c)(vi) in AMC E 790(a)(2).

(3) For the purposes of interpreting the words ‘sudden encounter’ in CS-E 790(a)(2) and the words ‘suddenly commencing’ in CS-E 790(b), see paragraphs (5)(c)(iv)(D) and (G) in AMC E 790(a)(2).

(4) For the purposes of interpreting the words ‘rapid acceleration’ and ‘rapid deceleration’ in CS-E 790(b)(2) and (b)(4) should be interpreted as meaning a throttle movement in not more than one second.

(5) If the Engine is certified under the assumption that the protection device considered under CS-E 790(d) is provided by the aircraft installation and if the compliance with CS-E 790(a) to (c) is waived, then the Engine approval would be endorsed accordingly and the Engine instructions for installation would need to impose the conditions of CS-E 790(d)(1) to (3) to the installation.

[Amdt No: E/1]

Details

Source-Title: AMC E 790 Rain and Hail Ingestion View latest amendments

Erulesid: ERULES-1963177438-8965 Compare versions

Domain: Initial airworthiness

Amendedby: Amendment 1

Applicabilitydate: 10 December, 2007

Entryintoforcedate: 10 December, 2007

Regulatorysource: ED Decision 2007/015/R Navigate

Regulatorysubject: CS-E

Typeofcontent: AMC to CS (Acceptable means of compliance to certification specification)

Parentir: CS-E 790 Ingestion of Rain and Hail

Origin: EASA

Category: EAR