Federal Aviation Administration, DOT

Section 171.275

(iii) The station power emission and
frequencies of the ISMLS localizer,
glide path, beacon markers, and associated compass locators, if any.
(iv) The hours of operation.
(v) Station identification call letters
and method of station identification
and the time spacing of the identification.
(vi) A description of the critical parts
that may not be changed, adjusted, or
repaired without an FAA flight check
to confirm published operations.
(d) The owner or his maintenance
representative must make a ground
check of the ISMLS facility periodically in accordance with procedures approved by the FAA at the time of commissioning, and must report the results
of the checks as provided in Section 171.275.
(e) Modifications to an ISMLS facility may be made only after approval by
the FAA of the proposed modification
submitted by the owner.
(f) The owner or the owner-s maintenance representative must participate
in inspections made by the FAA.
(g) Whenever it is required by the
FAA, the owner must incorporate improvements in ISMLS maintenance.
(h) The owner or his maintenance
representative must provide a sufficient stock of spare parts, including
solid state components, or modules to
make possible the prompt replacement
of components or modules that fail or
deteriorate in service.
(i) FAA approved test instruments
must be used for maintenance of the
ISMLS facility.
(j) The mean corrective maintenance
time of the ISMLS equipment may not
exceed 0.5 hours, with a maximum corrective maintenance time of not greater than 1.5 hours. This measure applies
to failures of the monitor, transmitter
and associated antenna assemblies,
limited to unscheduled outage and outof-tolerance conditions.
(k) The mean time between failures
of the ISMLS equipment may not be
less than 1,500 hours. This measure applies to unscheduled outages, out-oftolerance conditions, and failures of
the monitor, transmitter, and associated antenna assemblies.
(l) Inspection consists of an examination of the ISMLS equipment to ensure

that unsafe operating conditions do not
exist.
(m) Monitoring of the ISMLS radiated signal must ensure a high degree
of integrity and minimize the requirements for ground and flight inspection.
The monitor must be checked periodically during the in-service test evaluation period for calibration and stability. These tests and ground checks
of glide slope, localizer, and marker
beacon radiation characteristics must
be conducted in accordance with the
maintenance requirements of this section.
Section 171.275 Reports.
The owner of the ISMLS facility or
his maintenance representative must
make the following reports at the indicated time to the appropriate FAA Regional Office where the facility is located.
(a) Facility Equipment Performance and
Adjustment Data (FAA Form 198). The
FAA Form 198 shall be filled out by the
owner or his maintenance representative with the equipment adjustments
and meter readings as of the time of facility commissioning. One copy must
be kept in the permanent records of the
facility and two copies must be sent to
the appropriate FAA Regional Office.
The owner or his maintenance representative must revise the FAA Form
198 data after any major repair, modernization, or retuning to reflect an accurate record of facility operation and
adjustment. In the event the data are
revised, the owner or his maintenance
representative shall notify the appropriate FAA Regional Office of such revisions, and forward copies of the revisions to the appropriate FAA Regional
Office.
(b) Facility Maintenance Log (FAA
Form 6030-1). FAA Form 6030-1 is a permanent record of all the activities required to maintain the ISMLS facility.
The entries must include all malfunctions met in maintaining the facility
including information on the kind of
work and adjustments made, equipment failures, causes (if determined)
and corrective action taken. In addition, the entries must include completion of periodic maintenance required
to maintain the facility. The owner or
his maintenance representative must

839

VerDate Sep<11>2014

08:20 May 17, 2019

Jkt 247048

PO 00000

Frm 00849

Fmt 8010

Sfmt 8010

Y:\SGML\247048.XXX

247048