TY - JOUR AB - Instructions to Ground Engineers and Private Owners on Essential Modifications. Jointings for use in the fuel, oil or water systems of civil aircraft must be of an approved type. Ultimately, such jointings will be required to conform to a Civil Specification which is now in course of preparation. In the meantime, a list of the various types of jointings at present approved is given below. VL - 10 IS - 5 SN - 0002-2667 DO - 10.1108/eb030314 UR - https://doi.org/10.1108/eb030314 PY - 1938 Y1 - 1938/01/01 TI - Air Ministry Official Notices T2 - Aircraft Engineering and Aerospace Technology PB - MCB UP Ltd SP - 154 EP - 154 Y2 - 2024/09/23 ER -