Page 1.4 Chapter 1 General APR 2019
1-60 Definitions and Abbreviations
Refer to R66 Pilot's Operating Handbook (POH) Section 1 for additional definitions and
abbreviations.
A. Definitions
14 CFR § 27.602
Critical Part:
A part identified as a 14 CFR § 27.602 critical part within this
manual is subject to special inspection requirements. RHC
Technical Support must be notified whenever the part fails to meet
the special inspection requirements.
12 years: With respect to a 12 year inspection or life-limit, 12 years means 12
years from the date of the factory-issued airworthiness certificate
or factory-issued authorized release certificate (FAA Form 8130-3,
Airworthiness Approval Tag).
Annually: With respect to an annual inspection, annually means within the
preceding 12 calendar months.
Datum: An imaginary vertical plane from which all horizontal measurements
are taken for balance purposes with the aircraft in level flight
attitude. Refer to § 6-20 for R66 datum location.
Empty Weight: Empty Weight includes the weight of the airframe, powerplant,
required and installed equipment, fixed ballast, unusable fuel, and
gearbox oil. Refer to R66 Turbine Type Certificate Data Sheet
(TCDS) in § 4-30. Refer to Equipment List/Weight and Balance
Data Sheet (RF 134) and Weight and Balance Record in R66 POH
Section 6 for installed equipment.
Life-Limited Part:
Refer to § 4-10. Any part for which a mandatory replacement
limit is specified in the type design, the Instructions for Continued
Airworthiness, or the maintenance manual.
Time in Service: With respect to maintenance time records, time in service means
the time from the moment an aircraft leaves the surface of the
earth until it touches it at the next point of landing.
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