It is the duty of every cabin attendant to observe cabin activities as well as the wings and engines thought the cabin windows in order to detect any irregularities which may affect the aircraft operation, e.g.oil and fuel leakage, smoke from engines, loose fuel covers, etc. Any such irregularities must immediately be reported to the in-flight manager or the purser. All inspections should be made discreetly and in such a manner that passengers are not disturbed or frightened.