Table 2. UH-60 Box Frame Absorber Tuning Weight Adjustments

Figure 18. UH-60 Box Frame Absorber Main Rotor 4/REV Vibration Check And Tuning Procedure

TASK 8 100 HOUR ENGINE OUTPUT SHAFT AND OIL COOLER VIBRATION TESTING

TM-1-6625-724-13P Aviation Vibration Analyzer Manual
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0069 00 TM 1-6625-724-13&P 0069 00-32 Table 2. UH-60 Box Frame Absorber Tuning Weight Adjustments TABLE 2.1 Cabin Absorber (PN 70219-02159-041) Minimum Cabin Frame ips at: Weight Change (lb.) 98%Nr Remove 1.75 99%Nr Remove 1.05 100%Nr Remove 0.35 100.5%Nr No Change 101%Nr Add 0.35 102%Nr Add 1.05 TABLE 2.2 Nose Absorber (PN 70219-01041-041) Maximum Pilot Heel Vertical (ips) Weight Change (lb.) 0.61-0.75 Add 0.70 0.76-0.90 Add 1.05 TABLE 2.3 Minimum Pilot Heel Vertical (ips) Weight Change (lb.) 0.00-0.15 Remove 0.70 0.16-0.30 Remove 0.35 Box Frame Absorber Tuning Weights: (applicable to both cabin and nose absorber) 78286-70219-01045-101 0.35 lb. 78286-70219-01045-102 0.70 lb. 78286-70219-01045-103 1.40 lb. 78286-70219-01045-104 3.40 lb. 78286-70219-01045-105 7.80 lb. 78286-70219-01045-106 3.20 lb.

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