U.S. DEPARTMENT OF TRANSPORTATION
FEDERAL AVIATION ADMINISTRATION

Section 5. Computer-Generated NOTAM Service Messages

4-5-1. MONITORING

a. All input transmissions from a facility are monitored by the USNS computer for the presence of an ADP code. The validity of the station identifier, format, and times are also checked before the USNS computer assigns a number and updates the NOTAM master file.

b. Errors in the station identifier or the format will result in a computer-generated service message being sent to the facility of origin. (See paragraph 4­5­2 for examples). The service message will identify the NOTAM parameter which was in error. A rejection (R) requires corrective action as soon as possible.

c. When a NOTAM is rejected, it is not distributed. It will not be stored in the NOTAM master file, and it will not be available by request-reply. Error messages are not stored in the master file.

4-5-2. NOTAM SERVICE MESSAGES

If data is entered incorrectly, it will be rejected. Each rejection will be preceded with a service message (SVC) explaining the cause for the rejection. Below are some examples of the type of reject messages received.

a. Invalid accountability location for a specific affected facility and missing keyword.

EXAMPLE-
GG KCLEYFYX
071356 KDZZNAXX
!SVC LOCATION NOT VALID FOR CLE CLE LNN
FUEL NOT AVBL 1307040000­1307061200EST

b. Invalid NOTAM accountability location.

EXAMPLE-
GG KRDUYFYX
071402 KDZZNAXX
!SVC NOTAM D ACCOUNTABILITY NOT FOUND NLN
LNN RWY CLSD 1307040000­1307061200

c. Invalid affected location.

EXAMPLE-
GG KCLEYFYX
071333 KDZZNAXX
!SVC NOTAM (D) LOCATION NOT FOUND CLE VBV
RWY 4 CLSD 1307040000­1307061200

d. Invalid input format.

EXAMPLE-
GG KDRIYFYX
252321 KDZZNAXX
!SVC INVALID SPACE BEFORE ACCOUNTABILITY

e. Unclear times.

EXAMPLE-
GG KCOUYFYX
081822 KDZZNAXX
!UNCLEAR DURATION OR EFFECTIVE TIME MCI MCI NAV VOR OUT OF SERVICE 1301251330­1301251500EST

NOTE-
The NOTAM was inserted after 1330 on the 25th of January and the NOTAM system cannot determine whether the NOTAM is for the present day after the fact. The NOTAM must be reissued with a new effective and expiration time.

EXAMPLE-
GG KOAKYFYX
232323 KDZZNAXX
!UNCLEAR DURATION OR EFFECTIVE TIME OAK OAK NAV DME OUT OF SERVICE 1301231630-1301230000

NOTE-
The time of 0000 can only be used as an effective time. The NOTAM must be issued with a correct expiration time.

EXAMPLE-
GG KCXOYFYX
191632 KDZZNAXX
!UNCLEAR DURATION OR EFFECTIVE TIME CXO CXO AD AIRPORT CLSD 1301262300−1301261600

NOTE-
Any NOTAM issued with an expiration time less than the beginning time must have a ten­digit date/time group later than the effective time.