ctive as long as the maintenance. pievenlative maintenance. and anerabons are performed in ... .,,l accordance with PartS21. 43. and91 of theFederal AviationRegulations. as aPPI le. and the aocran is leg:Ste:ea .ntrieUnitecl ....; . .• , States DATE OF ISSUANCE 7/23/90 DESIGNATION NUMBER , • DAR-41-FS-NM -