90 

14 CFR Ch. I (1–1–24 Edition) 

§ 121.127 

(2) Flight following centers located 

at those points necessary— 

(i) To ensure the proper monitoring 

of the progress of each flight with re-
spect to its departure at the point of 
origin and arrival at its destination, 
including intermediate stops and diver-
sions therefrom, and maintenance or 
mechanical delays encountered at 
those points or stops; and 

(ii) To ensure that the pilot in com-

mand is provided with all information 
necessary for the safety of the flight. 

(b) A certificate holder conducting 

supplemental operations may arrange 
to have flight following facilities pro-
vided by persons other than its employ-
ees, but in such a case the certificate 
holder continues to be primarily re-
sponsible for operational control of 
each flight. 

(c) A flight following system need not 

provide for in-flight monitoring by a 
flight following center. 

(d) The certificate holder’s oper-

ations specifications specify the flight 
following system it is authorized to use 
and the location of the centers. 

[Doc. No. 6258, 29 FR 19195, Dec. 31, 1964, as 
amended by Amdt. 121–253, 61 FR 2611, Jan. 
26, 1996] 

§ 121.127 Flight following system; re-

quirements. 

(a) Each certificate holder con-

ducting supplemental operations using 
a flight following system must show 
that— 

(1) The system has adequate facilities 

and personnel to provide the informa-
tion necessary for the initiation and 
safe conduct of each flight to— 

(i) The flight crew of each aircraft; 

and 

(ii) The persons designated by the 

certificate holder to perform the func-
tion of operational control of the air-
craft; and 

(2) The system has a means of com-

munication by private or available 
public facilities (such as telephone, 
telegraph, or radio) to monitor the 
progress of each flight with respect to 
its departure at the point of origin and 
arrival at its destination, including in-
termediate stops and diversions there-
from, and maintenance or mechanical 
delays encountered at those points or 
stops. 

(b) The certificate holder conducting 

supplemental operations must show 
that the personnel specified in para-
graph (a) of this section, and those it 
designates to perform the function of 
operational control of the aircraft, are 
able to perform their required duties. 

[Doc. No. 6258, 29 FR 19195, Dec. 31, 1964, as 
amended by Amdt. 121–253, 61 FR 2611, Jan. 
26, 1996] 

Subpart G—Manual Requirements 

§ 121.131 Applicability. 

This subpart prescribes requirements 

for preparing and maintaining manuals 
by all certificate holders. 

[Doc. No. 6258, 29 FR 19196, Dec. 31, 1964] 

§ 121.133 Preparation. 

(a) Each certificate holder shall pre-

pare and keep current a manual for the 
use and guidance of flight, ground oper-
ations, and management personnel in 
conducting its operations. 

(b) For the purpose of this subpart, 

the certificate holder may prepare that 
part of the manual containing mainte-
nance information and instructions, in 
whole or in part, in printed form or 
other form acceptable to the Adminis-
trator. 

[Doc. No. 28154, 60 FR 65926, Dec. 20, 1995] 

§ 121.135 Manual contents. 

(a) Each manual accessed in paper 

format must display the date of last re-
vision on each page. Each manual 
accessed in electronic format must dis-
play the date of last revision in a man-
ner in which a person can immediately 
ascertain it. Each manual required by 
§ 121.133 must: 

(1) Include instructions and informa-

tion necessary to allow the personnel 
concerned to perform their duties and 
responsibilities with a high degree of 
safety; 

(2) Be in a form that is easy to revise 

and; 

(3) Not be contrary to any applicable 

Federal regulation and, in the case of a 
flag or supplemental operation, any ap-
plicable foreign regulation, or the cer-
tificate holder’s operations specifica-
tions or operating certificate.