433 

Federal Aviation Administration, DOT 

§ 135.145 

(iii) For fleet operations, installation 

of equipment in a fleet aircraft after 
removal of the equipment for mainte-
nance from another aircraft in the 
same operator’s fleet. 

[Doc. No. 16097, 43 FR 46783, Oct. 10, 1978, as 
amended by Amdt. 135–22, 52 FR 3392, Feb. 3, 
1987] 

§ 135.144

Portable electronic devices. 

(a) Except as provided in paragraph 

(b) of this section, no person may oper-
ate, nor may any operator or pilot in 
command of an aircraft allow the oper-
ation of, any portable electronic device 
on any U.S.-registered civil aircraft op-
erating under this part. 

(b) Paragraph (a) of this section does 

not apply to— 

(1) Portable voice recorders; 
(2) Hearing aids; 
(3) Heart pacemakers; 
(4) Electric shavers; 
(5) Portable oxygen concentrators 

that comply with the requirements in 
§ 135.91; or 

(6) Any other portable electronic de-

vice that the part 119 certificate holder 
has determined will not cause inter-
ference with the navigation or commu-
nication system of the aircraft on 
which it is to be used. 

(c). The determination required by 

paragraph (b)(6) of this section shall be 
made by that part 119 certificate holder 
operating the aircraft on which the 
particular device is to be used. 

[Doc. No. FAA–1998–4954, 64 FR 1080, Jan. 7, 
1999, as amended by Docket FAA–2014–0554, 
Amdt. 135–133, 81 FR 33120, May 24, 2016] 

§ 135.145

Aircraft proving and valida-

tion tests. 

(a) No certificate holder may operate 

an aircraft, other than a turbojet air-
craft, for which two pilots are required 
by this chapter for operations under 
VFR, if it has not previously proved 
such an aircraft in operations under 
this part in at least 25 hours of proving 
tests acceptable to the Administrator 
including— 

(1) Five hours of night time, if night 

flights are to be authorized; 

(2) Five instrument approach proce-

dures under simulated or actual condi-
tions, if IFR flights are to be author-
ized; and 

(3) Entry into a representative num-

ber of en route airports as determined 
by the Administrator. 

(b) No certificate holder may operate 

a turbojet airplane if it has not pre-
viously proved a turbojet airplane in 
operations under this part in at least 25 
hours of proving tests acceptable to the 
Administrator including— 

(1) Five hours of night time, if night 

flights are to be authorized; 

(2) Five instrument approach proce-

dures under simulated or actual condi-
tions, if IFR flights are to be author-
ized; and 

(3) Entry into a representative num-

ber of en route airports as determined 
by the Administrator. 

(c) No certificate holder may carry 

passengers in an aircraft during prov-
ing tests, except those needed to make 
the tests and those designated by the 
Administrator to observe the tests. 
However, pilot flight training may be 
conducted during the proving tests. 

(d) Validation testing is required to 

determine that a certificate holder is 
capable of conducting operations safely 
and in compliance with applicable reg-
ulatory standards. Validation tests are 
required for the following authoriza-
tions: 

(1) The addition of an aircraft for 

which two pilots are required for oper-
ations under VFR or a turbojet air-
plane, if that aircraft or an aircraft of 
the same make or similar design has 
not been previously proved or validated 
in operations under this part. 

(2) Operations outside U.S. airspace. 
(3) Class II navigation authoriza-

tions. 

(4) Special performance or oper-

ational authorizations. 

(e) Validation tests must be accom-

plished by test methods acceptable to 
the Administrator. Actual flights may 
not be required when an applicant can 
demonstrate competence and compli-
ance with appropriate regulations 
without conducting a flight. 

(f) Proving tests and validation tests 

may be conducted simultaneously 
when appropriate. 

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