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293 

Federal Aviation Administration, DOT 

Pt. 121, App. G 

Maneuvers/Procedures 

Required Permitted 

Simulated 

instrument 

conditions 

Inflight 

Visual 

simu-

lator 

Non-

visual 

simu-

lator 

Training 

device 

Waiver 

provisions of 
§ 121.441(d) 

VII. Emergency Procedures: 
Each applicant must demonstrate the proper emergency proce-

dures for as many of the emergency situations listed below 
as the person conducting the check finds are necessary to 
determine that the person being checked has an adequate 
knowledge of, and ability to perform, such procedure: 

(a) Fire in flight .....................................................................

.................

...........

..........

B  ..........

......................

(b) Smoke control .................................................................

.................

...........

..........

B  ..........

......................

(c) Rapid decompression .....................................................

.................

...........

..........

B  ..........

......................

(d) Emergency descent ........................................................

.................

...........

..........

B  ..........

......................

(e) Any other emergency procedures outlined in the appro-

priate approved Airplane Flight Manual ...........................

.................

...........

..........

B  ..........

......................

[Doc. No. 9509, 35 FR 99, Jan. 3, 1970, as amended by Amdt. 121–80, 36 FR 19362, Oct. 5, 1971; 
Amdt. 121–91, 37 FR 10730, May 27, 1972; Amdt. 121–92, 37 FR 12717, June 28, 1972; Amdt. 121– 
108, 38 FR 35448, Dec. 28, 1973; Amdt. 121–136, 42 FR 43389, Aug. 29, 1977; Amdt. 121–366, 78 FR 
67844, Nov. 12, 2013; Docket FAA–2013–0485, Amdt. 121–376, 81 FR 90175, Dec. 13, 2016; Amdt. 121– 
376B, 83 FR 1187, Jan. 10, 2018; 83 FR 4420, Jan. 31, 2018] 

A

PPENDIX

TO

P

ART

121—D

OPPLER

 

R

ADAR

AND

I

NERTIAL

N

AVIGATION

 

S

YSTEM

(INS): R

EQUEST FOR

E

VAL

-

UATION

; E

QUIPMENT AND

E

QUIPMENT

 

I

NSTALLATION

; T

RAINING

P

ROGRAM

E

QUIPMENT

A

CCURACY

AND

R

ELI

-

ABILITY

; E

VALUATION

P

ROGRAM

 

1. 

Application authority. 

(a) An applicant for 

authority to use a Doppler Radar or Inertial 
Navigation System must submit a request 
for evaluation of the system to the respon-
sible Flight Standards office charged with 
the overall inspection of its operations 30 
days prior to the start of evaluation flights. 

(b) The application must contain: 
(1) A summary of experience with the sys-

tem showing to the satisfaction of the Ad-
ministrator a history of the accuracy and re-
liability of the system proposed to be used. 

(2) A training program curriculum for ini-

tial approval under § 121.405. 

(3) A maintenance program for compliance 

with subpart L of this part. 

(4) A description of equipment installation. 
(5) Proposed revisions to the Operations 

Manual outlining all normal and emergency 
procedures relative to use of the proposed 
system, including detailed methods for con-
tinuing the navigational function with par-
tial or complete equipment failure, and 
methods for determining the most accurate 
system when an unusually large divergence 
between systems occurs. For the purpose of 
this appendix, a large divergence is a diver-
gence that results in a track that falls be-
yond clearance limits. 

(6) Any proposed revisions to the minimum 

equipment list with adequate justification 
therefor. 

(7) A list of operations to be conducted 

using the system, containing an analysis of 

each with respect to length, magnetic com-
pass reliability, availability of en route aids, 
and adequacy of gateway and terminal radio 
facilities to support the system. For the pur-
pose of this appendix, a gateway is a specific 
navigational fix where use of long range 
navigation commences or terminates. 

2. 

Equipment and equipment installation—In-

ertial Navigation Systems 

(

INS

or Doppler 

Radar System. 

(a) Inertial Navigation and 

Doppler Radar Systems must be installed in 
accordance with applicable airworthiness re-
quirements. 

(b) Cockpit arrangement must be visible 

and useable by either pilot seated at his duty 
station. 

(c) The equipment must provide, by visual, 

mechanical, or electrical output signals, in-
dications of the invalidity of output data 
upon the occurrence of probable failures or 
malfunctions within the system. 

(d) A probable failure or malfunction with-

in the system must not result in loss of the 
aircraft’s required navigation capability. 

(e) The alignment, updating, and naviga-

tion computer functions of the system must 
not be invalidated by normal aircraft power 
interruptions and transients. 

(f) The system must not be the source of 

cause of objectionable radio frequency inter-
ference, and must not be adversely affected 
by radio frequency interference from other 
aircraft systems. 

(g) The FAA-approved airplane flight man-

ual, or supplement thereto, must include 
pertinent material as required to define the 
normal and emergency operating procedures 
and applicable operating limitations associ-
ated with INS and Doppler performance 
(such as maximum latitude at which ground 
alignment capability is provided, or devi-
ations between systems). 

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