Chapter 6
are presented in Chapter 5.
6.9.4. Grading. The surface of the unsuppressed power check pad must slope 3.5 percent in all
directions from the anchor block to pavement edge to divert the effect of jet blast away from the
concrete surfaces and pavement joints.
6.9.5. Thrust Anchors/Mooring Points. Thrust anchors (Air Force) or mooring points (Army)
tiedown mooring eyes (Navy and Marine Corps) are required on unsuppressed power check pads.
Layout for these anchors are interdependent of joint spacing and the two should be coordinated
together.
6.9.5.1. Army and Air Force. Power check pad (thrust anchor) for up to 267 kN (60,000 lbs)
(Army and Air Force aviation facilities) are found in Attachment 16. High capacity trim pad
design (444.8 kN (100,000 lbs) is addressed in USAF Engineering Technical Letter (ETL) 01-
10, Design and Construction of High-Capacity Trim Pad Anchoring Systems.
6.9.5.2. Navy and Marine Corps. Power check pad tiedown mooring eye for Navy and Marine
Corps aviation facilities are found in NAVFAC Drawings 1404838-1404857.
6.9.6. Anchor Blocks. All unsuppressed power check pads have a thrust anchor block installed in
the center of the power check pad to anchor the aircraft during engine testing. Anchor blocks are
structurally designed for each individual aircraft. The designer must verify structural adequacy of
the anchor block for the mission aircraft and engine type.
6.9.6.1. Army and Air Force. Thrust anchor blocks for Army and Air Force aviation facilities
are found in Attachment 16.
6.9.6.2. Navy and Marine Corps. Thrust anchor blocks for Navy and Marine Corps aviation
facilities are found in NAVFAC Drawings 1404838-1404857.
6.9.7. Power Check Pad Facilities.
6.9.7.1. Required Facilities. The unsuppressed power check pad should consist of the following
required items:
6.9.7.1.1. Paved surface.
6.9.7.1.2. Thrust anchor.
6.9.7.1.3. Paved shoulders (see Attachment 8 for minimum standoff distances).
6.9.7.1.4. A thrust anchor or anchors for aircraft serviced at the pad.
6.9.7.1.5. Blast deflectors if required to protect the surrounding area from jet blast damage.
6.9.7.2. Optional Facilities. The unsuppressed power check pad may include the following
items:
6.9.7.2.1. Floodlighting for night operations.
6.9.7.2.2. Water supply to wash down fuel spills.
6.9.7.2.3. Oil separators, holding tanks, and fuel treatment to address fuel spillage prior to
discharge into sanitary or storm sewer.
6.9.7.2.4. Communication link with the maintenance control room.
6.9.7.2.5. Fire hydrants.
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