839 

Federal Aviation Administration, DOT 

§ 171.211 

must be made under arrangements, sat-
isfactory to the Federal Aviation Ad-
ministration, that are made by the 
owner. 

§ 171.209 Installation requirements. 

(a) The facility must be installed ac-

cording to accepted good engineering 
practices, applicable electric and safe-
ty codes, and Federal Communications 
Commission requirements. 

(b) The facility must have a reliable 

source of suitable primary power. 

(c) Dual transmitting equipment may 

be required, if applicable, to support 
certain IFR procedures. 

(d) At facilities within or imme-

diately adjacent to controlled airspace 
and that are intended for use as instru-
ment approach aids for an airport, 
there must be ground-air communica-
tions or reliable communications (at 
least a landline telephone) from the 
airport to the nearest Federal Aviation 
Administration air traffic control or 
communication facility. Compliance 
with this paragraph need not be shown 
at airports where an adjacent Federal 
Aviation Administration facility can 
communicate with aircraft on the 
ground at the airport and during the 
entire proposed instrument approach 
procedure. In addition, at low traffic 
density airports within or immediately 
adjacent to controlled airspace, and 
where extensive delays are not a fac-
tor, the requirements of this paragraph 
may be reduced to reliable communica-
tions (at least a landline telephone) 
from the airport to the nearest Federal 
Aviation Administration air traffic 
control or communications facility, if 
an adjacent Federal Aviation Adminis-
tration facility can communicate with 
aircraft during the proposed instru-
ment approach procedure, at least 
down to the minimum en route alti-
tude for the controlled airspace area. 

[Doc. No. 10116, 35 FR 12716, Aug. 11, 1970, as 
amended by Amdt. 171–16, 56 FR 65665, Dec. 
17, 1991] 

§ 171.211 Maintenance and operations 

requirements. 

(a) The owner of the facility shall es-

tablish an adequate maintenance sys-
tem and provide qualified maintenance 
personnel to maintain the facility at 
the level attained at the time it was 

commissioned. Each person who main-
tains a facility shall meet at a min-
imum the Federal Communications 
Commission’s licensing requirements 
and show that he has the special 
knowledge and skills needed to main-
tain the facility, including proficiency 
in maintenance procedures and the use 
of specialized test equipment. 

(b) The owner must prepare, and ob-

tain approval of, and each person who 
operates or maintains the facility shall 
comply with, an operations and main-
tenance manual that sets forth proce-
dures for operations, preventive main-
tenance, and emergency maintenance, 
including instructions on each of the 
following: 

(1) Physical security of the facility. 
(2) Maintenance and operations by 

authorized persons only. 

(3) Federal Communications Commis-

sion’s requirements for operating and 
maintenance personnel. 

(4) Posting of licenses and signs. 
(5) Relations between the facility and 

Federal Aviation Administration air 
traffic control facilities, with a de-
scription of the boundaries of con-
trolled airspace over or near the facil-
ity, instructions for relaying air traffic 
control instructions and information 
(if applicable). 

(6) Notice to the Administrator of 

any suspension of service. 

(7) Detailed arrangements for main-

tenance, flight inspection, and serv-
icing, stating the frequency of serv-
icing. 

(8) Keeping of station logs and other 

technical reports, and the submission 
of reports required by § 171.213. 

(9) Monitoring of the facility, at least 

once each half hour, to assure contin-
uous operation. 

(10) Inspections by U.S. personnel. 
(11) Names, addresses, and telephone 

numbers of persons to be notified in an 
emergency. 

(12) Shutdowns for routine mainte-

nance and issue of ‘‘Notices to Airmen’’ 
for routine or emergency shutdowns 
(private use facilities may omit the 
‘‘Notice to Airmen’’). 

(13) Commissioning of the facility. 
(14) An acceptable procedure for 

amending or revising the manual. 

(15) The following information con-

cerning the facility: 

840 

14 CFR Ch. I (1–1–24 Edition) 

§ 171.213 

(i) Location by latitude and lon-

gitude to the nearest second, and its 
position with respect to airport lay-
outs. 

(ii) The type, make, and model of the 

basic radio equipment that will provide 
the service. 

(iii) The station power emission and 

frequency. 

(iv) The hours of operation. 
(v) Station identification call letters 

and methods of station identification, 
whether by Morse Code or recorded 
voice announcement, and the time 
spacing of the identification. 

(c) If the owner desires to modify the 

facility, he shall submit the proposal 
to the Federal Aviation Administra-
tion and meet applicable requirements 
of the Federal Communications Com-
mission, and must not allow any modi-
fication to be made without specific 
approval by the Federal Aviation Ad-
ministration. 

(d) The owner’s maintenance per-

sonnel shall participate in initial in-
spections made by the Federal Avia-
tion Administration. In the case of sub-
sequent inspections, the owner or his 
representative shall participate. 

(e) The owner shall provide a stock of 

spare parts, of such a quantity to make 
possible the prompt replacement of 
components that fail or deteriorate in 
service. 

(f) The owner shall shut down the fa-

cility by ceasing radiation, and shall 
issue a ‘‘Notice to Airmen’’ that the fa-
cility is out of service (except that pri-
vate use facilities may omit ‘‘Notices 
to Airmen’’) upon receiving two succes-
sive pilot reports of its malfunctioning. 

§ 171.213 Reports. 

The owner of each facility to which 

this subpart applies shall make the fol-
lowing reports, at the times indicated, 
to the Federal Aviation Administra-
tion Regional Office for the area in 
which the facility is located: 

(a) Record of meter readings and ad-

justments (Form FAA–198). To be filled 
out by the owner or his maintenance 
representative with the equipment ad-
justments and meter readings as of the 
time of commissioning, with one copy 
to be kept in the permanent records of 
the facility and two copies to the ap-
propriate Regional Office of the Fed-

eral Aviation Administration. The 
owner must revise the form after any 
major repair, modification, or re-
tuning, to reflect an accurate record of 
facility operation and adjustment. 

(b) Facility maintenance log (FAA 

Form 6030–1). This form is a permanent 
record of all equipment malfunctioning 
met in maintaining the facility, in-
cluding information on the kind of 
work and adjustments made, equip-
ment failures, causes (if determined), 
and corrective action taken. The owner 
shall keep the original of each report 
at the facility and send a copy to the 
appropriate Regional Office of the Fed-
eral Aviation Administration at the 
end of the month in which it is pre-
pared. 

(c) Radio equipment operation record 

(Form FAA–418), containing a complete 
record of meter readings, recorded on 
each scheduled visit to the facility. 
The owner shall keep the original of 
each month’s record at the facility and 
send a copy of it to the appropriate Re-
gional Office of the Federal Aviation 
Administration. 

[Doc. No. 10116, 35 FR 12716, Aug. 11, 1970, as 
amended by Amdt. 171–10, 40 FR 36110, Aug. 
19, 1975] 

Subpart I—Interim Standard 

Microwave Landing System 
(ISMLS) 

S

OURCE

: Docket No. 14120, 40 FR 36110, Aug. 

19, 1975, unless otherwise noted. 

§ 171.251 Scope. 

This subpart sets forth minimum re-

quirements for the approval and oper-
ation of non-Federal Interim Standard 
Microwave Landing System (ISMLS) 
facilities that are to be involved in the 
approval of instrument flight rules and 
air traffic control procedures related to 
those facilities. 

§ 171.253 Definitions. 

As used in this subpart: 

Angular displacement sensitivity 

(Glide 

Slope) means the ratio of measured 
DDM to the corresponding angular dis-
placement from the appropriate ref-
erence line. 

Collocated ground station 

means the 

type of ground station which transmits