434ARWI21-107 — Air Traffic Control Equipment Maintenance, Restoration, And Coordination

434ARWI21-107 governs air traffic control equipment maintenance, restoration, outage reporting, response times, and coordination.

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  • Publication number: 434ARWI21-107
  • Title: AIR TRAFFIC CONTROL EQUIPMENT MAINTENANCE, RESTORATION, AND COORDINATION
  • Date: 2023-02-03

View 434ARWI21-107 on armypubs.army.mil


It covers scheduled and unscheduled maintenance, equipment interruptions and malfunctions, restoration priorities, and planned or emergency outages. It requires coordination among maintenance, air traffic control, airfield operations, and other affected agencies.

Applies to: This instruction applies to the Radar, Airfield, and Weather Systems (RAWS) Maintenance and Air Traffic Control (ATC) agencies on Grissom Air Reserve Base; and attachments 4 and 5 will also apply to Airfield Management and Weather Station.

Topics covered

  • RAWS equipment maintenance
  • Scheduled preventive maintenance inspections
  • Unscheduled equipment downtime
  • Restoration priorities
  • Equipment outage reporting
  • NOTAM monitoring
  • DASR antenna restart procedures

Questions and answers

What weather conditions are required before scheduled RAWS maintenance?

Forecasted weather will be a least 3000ft ceiling and 5 miles visibility thru the period the requested RAWS equipment is to be withdrawn from service. (T-3). (paragraph 2)

How far in advance should significant RAWS downtime affecting flying operations be coordinated?

Significant downtime request of RAWS equipment that will impair the flying mission will be coordinated as far in advance as possible with the Airfield Operations Manager or in his absence the Air Traffic Manager (ATM) during normal duty hours, Monday-Friday, 0730L to 1530L. (paragraph 3)

Who approves significant RAWS downtime outside normal duty hours?

The ATC WS/CIC will defer maintenance downtime request until approved by the OG/CC or designated authority. (paragraph 3)

What happens during an emergency RAWS shutdown at Grissom?

Emergency conditions that warrant the immediate withdraw of Grissom’s RAWS will be immediately reported to the ATC WS/CIC through the COM with the final determination and coordination to shut down the RAWS equipment by ATC. (T-3). (paragraph 3)

What facility monitors NOTAMs for RAWS performance information?

The RAPCON is designated as the primary NOTAM monitor facility and serves as the focal point for all information concerning RAWS performance. (paragraph 3)

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