FAA Federal Aviation Regulations (CFR 14 Part 1)
Time in service, with respect to maintenance time records, means the time from the moment an aircraft leaves the surface of the earth until it touches it at the next point of landing.
See
eCFR ? Code of Federal Regulations
They are mixing it up with
Flight time means:
(1) Pilot time that commences when an aircraft moves under its own power for the purpose of flight and ends when the aircraft comes to rest after landing; or
(2) For a glider without self-launch capability, pilot time that commences when the glider is towed for the purpose of flight and ends when the glider comes to rest after landing.
MODEL 152
SERIES SERVICE MANUAL
2-46.
INSPECTION REQUIREMENTS: As required by Federal Aviation Regulations, all aircraft
must
undergo a 100 hour and/or annual inspection or may be inspected in accordance with
FAA approved Progressive Inspection.
2-47. 100
HOUR AND/OR ANNUAL INSPECTIONS: (Refer to the Inspection Charts. Column 1.)
This
inspection ~equires each item marked with a symbol to be inspected at each 100 hours
of flight time and/ or each 12th month following the last inspection recorded for the aircraft.
2-48. SPECIAL INSPECTIONS: (Refer to the Inspection Charts. Column 2.) This inspection
requires
each item that has a numeral inserted in the column be inspected m accordance
with the corresponding numeral listed in the back of the Inspection Charts.
2-49. PROGRESSIVE INSPECTIONS: (Refer to the Inspection Charts, Column 3.) In lieu of the
conventional 100
hourl annual inspection as covered in Part 91.169 of the Federal Avlatlon
Regulations,
an aircraft may be inspected m accordance with 8 progressive mspectlon.
Progressive inspection
allows the inspect~on work load to be divided into smaller operations
that can be accomplished in 8 shorter time period and offers mcreased safety
reliability.
and utility while decreasing downtime, Aircraft on this program do not require
the 100 hour/annual inspection. "Cessna Progressive Care" has been designed for th~s
purpose. It is highly recommended for aircraft being flown 200 hours or more per year