THE HONG KONG GOVERNMENT GAZETTE, MARCH 25, 1937.
by new bolts and self-locking nuts obtainable from the Fairey Aviation Co., Ltd. In the case of some airscrews, however, the counterbores in the boss blocks are insufficiently deep to allow replacement bolts with self-locking nuts to be fitted below the faces of the blocks, and in such cases the bolts and nuts removed are to be replaced by some of the same type, the nuts finally being secured by riveting over the ends of the bolts.
8. When spinners are being re-assembled, care is to be taken to ensure that there is sufficient clearance between the blades and the spinner body to prevent chafing.
9. After re-assembly, and prior to further use, the air- screws must be checked for blade angles, track, alignment and static balance, if facilities are available. The blade angles at three-quarters of the maximum radius must not differ by more than 0° 10′. The difference between blades, in track and alignment measured at the tip, must not exceed 1 inch and inch, respectively. The error in balance must not exceed 5 inch-ounces. Should facilities for the above tests not be available, ground tests on the engine, and if these are satisfactory, flight tests, are to be made to ascertain if the airscrew runs smoothly. If rough running is experienced, the airscrew is to be removed from the hub and the location bolts slacked off and then re-tightened. If, on further tests, rough running still persists, the airscrew is to be returned to the Fairey Aviation Co., Ltd., Hayes, Middlesex, for adjust-
ment.
10. The airscrews which are to be subjected to detail inspection after periods not exceeding 50 hours flying are those numbered as follows, each number being prefixed by the letters "F.R.":-
371 1413
1471
1500
1568 2081
372
1414
1472
1502
1569
2082
491
1415 1473
1504
1570
2083
817
1425 1474
1505
1760
2085
927H 1427
1475
1506
1761 2101
950
1429
1476
1507
1762 2103
1191
1460 1477
1508
1862H 2105
1193
1461 1204 1462 1205 1233 1464 1243 1244 1466 1493
*1481 1509
1863H 2274
1484 1510
1864H 2278
1463 1487
1512
1865H 2321
1488
1513
1925H 2323
1465
1491
1515
1929 2324
1560
2036 2326
1245 1467 1246 1468 1495 1247 1469 1496 1248 1470 1498
1494
1561
2038 2327
1564 2039
2686
1566 2079
1567
2080
and any of the airscrews quoted in para. 11 which are declared serviceable after inspection by the makers,
11. Airscrews of obsolescent design, in view of their age and the possible repairs or adjustments made, are to be withdrawn from use forthwith, and returned to the makers for inspection, when their serviceability will be further considered. These airscrews are numbered as follows, each number being profixed by the letters "F.R." :-
238
1227
1480
1563
2040
247
1241
1482
1565
2084.
314
1242
1485
1571
2086
333
1250
1492
1757
2104
489
1418
1497
1758
2276
500
1419
1511
1759
2279
287